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different types of constants in c with examples
What is const char in C? Constants can be of any of the basic data types like an integer constant, a floating constant, a character constant, or a string literal. Every escape sequence has its own special functionality and every escape sequence is prefixed with '\' symbol. There can be any types of constants like integer, float, octal, hexadecimal, character constants, etc. In secondary constants, we have Array, structure, union, pointer, etc. An integer constant is the numeric constant (constant associated with numbers) without any fractional part or exponential part. Both the inverted commas should point to the left. #include <stdio.h> int main() { const int a = 10; int const * const ptr = &a; printf("%d", *ptr); return 0; } Output 10 These type of pointers can also point to non-const variables. TYPES OF LITERAL . There are 4 types of literal in C and five types of literal in C++. The types can take the following values: Integer constants are positive decimal integers from 0 to 2147483647. A constant is a value that doesn't change throughout the execution of a program. Both positive and negative integers are used. In between the integer constant we do not have any separators including comma (,). The valid examples of floating points constants are 0.54e2, 12e-4, 1.5e+5, 2.13E4, -1.5E-4, etc. For Loop and While Loop , they are entry-controlled loops. Congratulations! It is considered best practice to define constants using only upper-case names. Ever Octal constant stars with 0 and hexadecimal constant starts with 0x in C Programming. It can work with any fundamental data type. All these Constants are broadly classified into three categories. They are also called as "literals".For example:1,9.67,"character" etc. Real constants are the numeric constants that have either fractional form or exponential form. No comma and blank space are allowed within a real constant. C Constants refer to fixed values whose values remain the same during the whole program. C recognizes. C++ constant is defined in two different ways. C makes use of only 32 keywords or reserved words which combine with the formal syntax to form the C programming language. Character set refers to the characters that are recognized and accepted in C Language. It is also called a Floating-Point constant. Integer Constants can be further classified into three types: Decimal number system constants Octal number system constants Hexadecimal number system constants 2. Required fields are marked *. In this example a single character 'a' is stored inside the variable (or address) x, so 'a' is nothing but a character literal. Constants are also called as literals. These are the constants consisting of whole numbers without a decimal point. sign qualifiers(U or u) : are suffixed with literals to indicate the value as unsigned integer type. Constants are the terms that cannot be changed during the execution of a program. Back to: C Tutorials For Beginners and Professionals. Here is the list which will help you to understand how to declare constants:
Suppose the bank decides to increase the minimum balance to 2500 Rs, you don't require to change all the integer literals. Basically C language has 4 data types and obviously we can say that there are 4 types of constants. Decimal Integers consists of a set of digits 0 to 9 preceded by an optional + or - sign. Your email address will not be published. Unlike variables, constants are the fixed values that cannot be changed during the execution of the program. Following is the character set in 'C' programming: Letters Uppercase characters (A-Z) Lowercase characters (a-z) Numbers All the digits from 0 to 9 size qualifiers L or l ) : are suffixed with literals to denote the size of the integer type as long . The #define is a function in the C programming language that helps define macros along with the source code present. C Programming language support different types of Constants. In C++, it is possible to define a constant for most of the basic, build-in data types: char, int, float, long etc. Real or floating-point constants are integers with fractional portions, such as 99.25. You do not declare types for constants; the value of a constant determines its type. In this article, I am going to discuss Constants in C Language with Examples. Examples. Constants can be any of the data types. const char * msg = "hello world"; We can use small caps a, b, and c instead of uppercase letters while writing a hexadecimal constant. Constants are effectively static because the value of the constant is the same in all instances of the class but you can declare constants without a static keyword an example is shown below. 'x' and 'X' or 'e'and 'E' all mean the same. Thus, -0.22E-5 = -0.0000022). Constants can be of any of the basic data types like an integer constant, a floating constant, a character constant, or a string literal. Declaration tells the compiler what the variable name is and what type of data the variable will hold. Tutorials Class (TutorialsClass.com) is one stop portal to learn online about different web technologies, preparing for an interview and enhancing your technical skills. First sentence, almost, it creates a pointer that might point to an immutable array of chars. We can use small caps a, b, and c instead of uppercase letters while writing a hexadecimal constant. Integer literals in C are numeric values that represent integer type values only.No fractional or exponential values can be represented.The integer literal can be of three types: Integer Literals. In the next article, I am going to discuss. Constants are initialized at the time of creating it, and remains constant and cannot be changed later. int age = 19; Age is an integer variable and 19 is a literal constant. For example, "const int = 5;", is a constant expression and the value 5 is referred to as a constant integer literal. Here is an overview of the different kinds of numeric literals with their data type and some examples: Data type Suffix Example Remarks; int: 42-7 052 0x2a: no suffix necessary negative value . For example '\t' accounts for a tablespace or ' \n' for moving a cursor to the next line. Answer: In C language, a number or character or string of characters is called a constant. Suppose you are writing a program for banking software where the minimum balance is 1000 Rs. Operators and Expressions operator types 1.Keywords : Keywords are words that have special meaning to the C compiler. Integer constants can be written in three different number systems, those are decimal, octal, and hexadecimal number system. explain different types of constant in 'c' with examples?, the Visual Basic Toolbox contains many Dash , Ayush is working with CSS Style Sheets. implement different HTML Tags for Text Formatting. These types of audits ensure compliance with laws and regulations and help to . Decimal Digits: 0 1 2 3 4 5 6 7 8 9 Different types of constants are: Integer Constant: An integer is a whole number without any fraction part. Constants are categorized into two basic types, each of which has subtypes/categories. These fixed values are also called. The data types "char", "int", "float" and "double" represent different types of constants we have. Real Constants Real or floating-point constants are integers with fractional portions, such as 99.25. Depending upon the number of operands, The Operators are Classified into 3 types. Literal is nothing but a constant value itself . 10,3369,555u. The 'const' is a simple keyword by which you can declare a constant using following syntax: So unlike preprocessor here we have to put semicolon (;) at the end as 'const' declaration is considered to be a statement, and assignment operator '=' is used to assign values the constants. They are also known as literals. Constants are also called as literals. Decimal Literals. Character constants For example: 'a', 'B', 'x' Constants are also called literals. So, the value of a constant remains the same during the entire program. Special characters such as #,*, /, &, <, >, (,), {,}, ; etc. There are four commonly used data types such as int, float, char and a void. Continue Reading Lawrence C. The real constant must have at least one digit. Constants refer to fixed values that the program may not alter during its execution. We can define constants in a C program in the following ways. C Variable Declaration and Initialization: The declaration means assigning a name to a memory location. Start Learning Now. These fixed values are also called literals. Here are some examples: 'A', 'c', '4', '$', '^'. , center aligned and colou Paragraph must have: font face as Verdana font weight as 720 DE 917 font style as font size as 2 the web page in, Give the output of the following Python program (a) A=35 B=12 print (a,b,a/b,a//b,a%b), . They are listed below: By using "const" keyword By using "#define " preprocessor Constant definition Using "const" keyword Syntax: const type constant_name; Example: const double PI = 3.14; Constant definition Using "#define" preprocessor Syntax: #define constant_name; Example: #define MAX 70 There are two types of constants Primary constants Integer, float, and character are called as Primary constants. The following figure depicts the types of constants available with C language. class clsPiValue { public const double Pi = 3.14; } class Program { static void Main (string [] args) { Console.WriteLine ("PI Value is : " + clsPiValue.Pi Constants refer to as fixed values, unlike variables whose value can be altered, constants - as the name implies does not change, they remain constant. Octal Literals. Numeric Constants. Embedded (blank) space is not permitted in any numeric constants. It just has a single character surrounded by (a pair of the single quotes). constant data_type variable = value ; Example. Integers are of three types viz: Decimal Integer Constants It can be a combination of digits taken from 0 to 9. Example. Exponential notation is useful to represent either very small or very large number in magnitude. Constants in C are variables whose value can't be changed after defining.In programming its is a good practice to use constants instead of literals. Character C# constants: A C# constants of type char contains a 16-bit number. Example: 0. The escape character says that it is not a normal character and does something. The const keyword is used to define constant in C programming. Example of decimal integer constants are 10, 25519, -565 e.t.c. A literal with no prefix and base of 10 are termed as, A literal prefixed with '0'' indicates that the number is an. What are different data type in C. A data type in C programming language declares the type of data that a variable can store and how much memory is required to store this data.C Data types can be classified into four categories: . Example: A, 5. char c2 = '\x41'; constant has a specific value. Example As letters construct words in C language, an array of characters is called a string in C. So a string is composed of characters, escape sequences, symbols and white space. It must have a decimal point. A character constant is a single digit, single alphabet, or a single special symbol. In this tutorial you will learn all about literals and constants in C language. For example, const signed int limit = 20; Example. A constant is a value or an identifier whose value cannot be altered in a program. These literals are mainly of two types-- real and complex. Ever Octal constant stars with 0 and hexadecimal constant starts with 0x in C Programming. Integer literal Float literal Character literal String literal 1) Integer Literals Integer literals are used to represent and store the integer values only. Constants can be of any of the basic data types like an integer constant, a floating constant, a character constant, or a string literal. Hello, 1987, ?. const char* const says that the pointer can point to a constant char and value of int pointed by this pointer cannot be changed. It should be noted that the letter 7 is not the same as the number 7. Constants in C are the fixed values that are used in a program, and its value remains the same during the entire execution of the program. The minus symbol - is used for negative numbers. There are various types of constants in C. It has two major categories- primary and secondary constants. [30] The maximum length of a character constant is 1 character long. In this example , x and y are string variables which store string literals Learn and C Programming. Numeric Constants Integer Constants It's referring to a digit sequence. We will understand this better once we look into each of the Integer constants. (a) Decimal Integer Numeric Constant: These have no decimal point in it and are either be alone or be the combination of 0-9 digits. !, x, , (null string constant). Constants can be any of the data types. We can also have some suffixes associated with it depending on whether the number is signed or unsigned or long etc. long double. [40] Q2. This array is assigned in the data section at compile time. Constants in any language would depend on the types of data the language supports. . Give an example value for each data type. These are: Primary Constants Numeric Constants Integer Constants Real Constants Character Constants Single Character Constants String Constants Backslash Character Constants Integer Constant It refers to a sequence of digits. Let's look at a few usages of a constant pointer to a constant in C. The following code shows the correct usage of a constant pointer to a constant. Integers are classified into three types: For Example: 45, -567, 0, 87351, +21, 0785, 0X78 and so on. What are the different data types that are available for declaring variables and constants in C? The value of a character constant is the numerical value of a character in the matching character set for example in the ASCII character set, character zero has a numerical value of 48 which is not at all related to the numerical value 0. It must have at least one digit. This is why constants are always preferred by the programmers than literals. about | contact | privacy policy | sitemap, Array or One Dimensional Array in C With Examples. Constants are also called literals. In statistics, a normal distribution or Gaussian distribution is a type of continuous probability distribution for a real-valued random variable.The general form of its probability density function is = ()The parameter is the mean or expectation of the distribution (and also its median and mode), while the parameter is its standard deviation.The variance of the distribution is . In the C programming language, there are some predefined character constants called escape sequences. The range of Real Constants is-3.4*1038 to 3.4*1038. There are three types of integer literals in C programming: decimal (base 10) octal (base 8) hexadecimal (base 16) For example: Decimal: 0, -9, 22 etc Octal: 021, 077, 033 etc Hexadecimal: 0x7f, 0x2a, 0x521 etc Codeblocks IDESetup in Windows for C Program Development, Creating a new project using CodeBlocks IDE, Time Complexity of Recursive Function in C, Adding user defined functions in C Library, How to Change Case of Alphabets in a String in C, How to Count Vowels and Consonants in a String in C, How to Compare String and Checking Palindrome in C, Finding Duplicates in a String using Bitwise Operations in C, How to Check if 2 Strings are Anagram in C, How to Pass Array as a Parameter to a Function in C, How to Pass Structure as a Parameter to a Function in C, C Tutorials For Beginners and Professionals. A constant of type char can be represented in different ways: char c1 = 'A'; Letter A (in Unicode representation) in c1. Exit Controlled Loops (ECLs): The test condition is evaluated or tested in this type of loop at the end of the loop body. For Example: WebsLearner, 45645 and so on. You can specify conditions of storing and accessing cookies in your browser, What is constant? Integer constants in c#: The only difference compared to C / C ++: no octal representation in C #. 0xdEbL,0x5Au. '#define' works like a function by declaring a constant name and assigning the value at once without using '='. In C, variables can be declared using the following syntax: datatype variable1; Multiple variables can be declared by separating them with commas as follows. cout<<" Hi guys"; The following statement contains "Hi guys" string literal constant. Enlisted below are the types of constants in C++: #1) Integer Constants. Initializer Element Is Not Constant With Code Examples In this session, we'll try our hand at solving the Initializer Element Is Not Constant puzzle by using the computer language. The character may be letters, numbers, special characters, and blank spaces. These macro definitions are different than variables. String Constants Integer Constants An integer constant is a sequence of digits from 0 to 9 without decimal points or fractional part or any other symbols. As part of this article, you will learn two things one is Character set and the other one is C Constants. Here's a list of different literals in C++ programming. There are different types of constants in C programming: Decimal Constant, Real or Floating-point Constant, Octal Constant, Hexadecimal Constant, Character Constant, String Constant, covering concepts, control statements, c array, c strings and more. Refer to the previous tutorial to learn more about these constants. An integer value can be represented, as in C / C ++: in base 10, which is the case by default; in base 16 (that is to say in hexadecimal representation), by prefixing the constant of 0x or 0X (number 0 followed by the letter X or x). Constants are also called as literals. Using macro definitions, we can define constant values, which can be used globally throughout the code we have. Any identifier cannot have the same spelling and case as a C keyword. Note: Character constant must be always enclosed in single quotes, so the following is wrong. W represents a string since it is contained by a pair of double quotes, whereas W indicates a single letter. It must be enclosed within single quotes. Numeric constants are once again divided into three types: Decimal Integer Octal Integer Hexadecimal Integer Integer Constants Integer constants are the numbers with decimals (base 10), hexadecimal (base 16), binary (base 2), or octal (base 8). !, x, , (null string constant). In C++, there are two ways of declaring a constant : using #define, a preprocessor directive; using the 'const' keyword; #define pi 3.14; // using #define const int k = 78; //using a 'const' keyword const datatype . The code that follows serves to illustrate this point. Constants are the terms that cannot be changed during the execution of a program. Types of Pointers in C There are various types of pointer in C, to put a number on it, we have 8 different types of pointers in C. They are as follows 1) Void pointer A pointer is said to be void when a pointer has no associated data type with it. These escape sequences are used in output . In C++ language constants are of two types: 1. Difference between constants and variables Constants are also like normal variables. In C++, loops are classified mainly into two types: Entry Controlled loops: Before entering the loop body, the test condition is tested in this type of loop. Character constants, real constants, and integer constants, etc., are types of primary constants. String Constant is a sequence of characters enclosed between double-quotes. It must not have any decimal point. Exponential Form: Example:-0.22E-5 (Here, E-5 represents 10-5. The base of decimal integer constants is 10. Constant in c programming in hindi | Explain types of constants in C programming | #constants 79,472 views Jun 19, 2020 2K Dislike Learn Coding 872K subscribers C language complete. An integer is a numeric literal (associated with numbers) without any fractional or exponential part. Integer literal; Float literal; Character literal; Escape Sequences; String . A variable declaration should be done in the declaration section of a program. iv. show, in general, how a for loop is written. There are different types of constants in C programming: Decimal Constant, Real or Floating-point Constant, Octal Constant, Hexadecimal Constant, Character Constant, String Constant, covering concepts, control statements, c array, c strings and more. 2) for Example:- Const int value=15 assigns constant integer value 15 to value and it is an integer leteral. Example: Hello, 1987, ?. Your email address will not be published. We very often confuse identifying constants and literals as there is a thin line lies between them. What are C constants? Constants can be classified into different types such as numeric constants and character constants. We provide free online tutorials on the latest web technologies. See all 183 solutions The real ones contain the following parts: I. Integer part II. HexaDecimal Literals. Please read our previous article, where we discussed the different parts of a C program. Additionally, these constants can have a different base or radix like decimal . Declaration of Variables. When we try to store more than one character to a character variable , the compiler will generate a warning which states multi-character character constants as shown below in the code fragment. In primary constants, we have integer constants, real constants, and character constants, etc. A constant is a number, character, or character string that can be used as a value in a program. The double and long double data types occupy 8 bytes of memory, while the float data types occupy 4 bytes. These are a string of characters surrounded by double quotations that may contain letters, numbers, special characters, or blank spaces. The range of Character Constants is -128 to 127. But, the only difference is, Constants values cant be modified by the program once they are defined. By constkeyword and by #define preprocessor directive. C++ Constants. The following data type is used to identify an alphabetic character or strings of characters: char. '+'. In the C programming language, we have constants, which are variables which cannot be modified once defined, that is, their value cannot be changed once initialized. If you try to change constant values after defining in C program, it will throw you an error. Non-Numeric Constant (Character Constant) These are further sub-divided into more categories. Each data type differs in size and range from one another. These fixed values are also called literals. As you can see, Numeric Constants further have two types, I.e Integer Constants and Real Constants. Internal audits evaluate a company's internal controls, including its corporate governance and accounting processes. When they are declared, they are also initialized. Usually this is the code a letter (the one with this value in the Unicode table). Any signed or unsigned number with the fractional part is called a real constant. Like this. Rather, you can just call the constant 'min_bal' whenever needed. In other words, it can point to any data type and also, it can be typecasted to any type. In c programming literals are broadly classified into four types: Integer literals in C are numeric values that represent integer type values only.No fractional or exponential values can be represented.The integer literal can be of three types: When you observe the above examples you can see the below findings. Secondary constants Array, structures, pointers, Enum, etc., called as secondary constants. Help him to specify the Css Properties for the formatting features shown below: Heading 5 must be underlined, And it can be any data type. Moreover, there is an opportunity for future alterations. float. My understanding of const char * declarations is that it defines a mutable pointer to an immutable array of characters. For example, you can perform arithmetic operations on numbers, but not on characters. In C language, a number or character or string of characters is called a constant. [20] Q3. Integer constants are always positive until we specify a negative (-) sign. For example - in expression 4y + 7y the constant is 4 and 7. There are 3 types of integer numeric constant namely decimal integer, octal integers and hexadecimal integer. If you attempt to modify the value of PI, a compile-time error will occur. We can define constants in a C program in the following ways. The following example will illustrate the use of #define preprocessor to assign a constant value. Types of constants Integer Constants This website provides tutorials on PHP, HTML, CSS, SEO, C, C++, JavaScript, WordPress, and Digital Marketing for Beginners. Constant must have to be initialized at the time of creating it, and new values cannot be assigned later to it. Range of integer constants is: -32,768 to 32,767. A string constant is an array of characters with a null character at the end of the string. Chapter Finished. Structure, array, pointer, union, etc., are types of secondary constants. While we can change the value of variables. An example of #defines to define a constant. Fractional part There are 4 . Facebook: https://facebook.com/tutorialsclass. For example: Here the number '10' and 'Learn C through Learn eTutorials' both are literals. C Constants, we have dealt with different types of constants in C programming with syntax and examples. Syntax const datatype variable; Example for Primary constants Live Demo -9, 22 etc. What you have to do is just going to the line where the constant is declared and replacing the value '1000' with '2500'. Summary. String Constants. There are two types of constants Primary constants Integer, float, and character are called as Primary constants. 036,099,024L. 1 2. ); Derived Data Type: Data types that are derived from fundamental data types are . Constants are divided into two main kinds, each with its own subtypes/categories. In C programming constants and literals mean fixed values which do not change in the course of the program. There are enumeration constants as well. (adsbygoogle = window.adsbygoogle || []).push({});
. Numeric Constant 2. Space characters such as blank spaces and tab spaces etc. The basic data types commonly used to define floating-point numbers or decimal numbers include: double. Tutorials Class is maintained by Merient Infotech (Rohtak). A constant like 'x' is different from "X". A character set in 'C' is divided into, Letters Numbers Special characters White spaces (blank spaces) A compiler always ignores the use ofcharacters, but it is widely used for formatting the data. C Constants refer to fixed values whose values remain the same during the whole program. These tutorials are well structured and easy to use for beginners. A Character constant is a single alphabet, digit or any special symbol enclosed using single quotes. Note :C allocates space for character literal while C will allocate space for string literal. We use the escape character along with the character. Decimal Form: Example: -2.0, 0.0000234, If you try to change constant values after defining in C program, it will throw you an error. If no sign is given, the number is assumed to be positive. There are two common types of constants in C++ Literal constant; Symbolic constant; Literal constant It is typed directly in the program and used when needed. It can be positive or negative but by default it is positive. Different types of literal constants are as follows: Integer Constant Integer constants are numeric values without fractions or decimal places. A string literal in C is a literal which is enclosed within double quotes.For instance . datatype variable1, variable2, variable3; For example, int x; Another important feature is all the alphabets used in the integer literals are not case-sensitive i.e. For example, 250000000 can also be written as 2.5e8 or 25E7. If you have any query or have any feedback about some Tutorials content, Contact Us. For example, 10, 20, a, 3.4, c programming, and so on with const keyword. 3) In this tutorial, we will go through an explanation of each of the different types of literals in C++. You can define a constant say 'min_bal' and give it a value 1000. And it can be any data type. With each tutorial, you may find a list of related exercises, assignments, codes, articles & interview questions. '2'. Integer Constants The floating- point literals can be represented in two forms: Character literals in C are single characters which are enclosed in single quotes. Example: 0x7f, 0x2a, 0x521 etc. There are two types of constants Primary constants Integer, float, and character are called as Primary constants. The constant is defined as a value or variable that cannot be modified inside the program. In the C/C++, there are 5 different types of constants depending upon their Data type: 4.1 Integer Constants As the name itself suggests, an integer constant is an integer with a fixed value, that is, it cannot have fractional value like 10, -8, 2019. Different types of constants. Integers are classified into three types: Decimal Integer Octal Integer Hexadecimal Integer For Example: 45, -567, 0, 87351, +21, 0785, 0X78 and so on. These have either +ve or -ve sign. Every constant has some range. For example: 1214, -1321, 10,254, -78, +99 etc. There are different basic types of constants provided by C, in turn, they are categorized into two major categories that are primary constants and secondary constants. Basic Data types: There are four basic data types in C(int, char, float and double. Give the syntax of a for loop in Ci.e. It should be noticed that G and G are not the same things. Find Computer Science textbook solutions? There are different types of constants in C programming List of Constants in C from CE GE2112 at Anna University, Chennai Any variable name in C, before using it, should be declared. For Example 45.1245, 0.46, 1.54, and so on. Integer Constants Real or Floating point Constants Character Constants. There are three types of integer constants in the C language: Decimal constant (base 10) "a" "e". Floating or Real Constants We use a floating-point constant to represent all the real numbers which can be shown on the number line, which also includes all fractional values. Octal Digits: 0 1 2 3 4 5 6 7 This site is using cookies under cookie policy . Thus, -0.22E-5 = -0.0000022). To specify constant or micro substitution, use the #define preprocessor command. There are 3 types of integers namely decimal integer, octal integers and hexadecimal integer. What are the 3 types of constants? A character constant has a maximum length of one character. The different types of constants that are used in C programming language are as follows Integer constants For example: 1,0,34,4567 Floating-point constants For example: 0.0, 156.89, 23.456 Octal & Hexadecimal constants For example: Hexadecimal: 0x2a, 0xaa .. and Octal: 033, 024,.. In the next article, I am going to discuss Operators in C Language with examples. Now there are various ranges that differ from unsigned to signed bits. Hexadecimal Digits: 0 1 2 3 4 5 6 7 8 9 A B C D E F The maximum length can be 1 character. In C language, objects with static storage duration have to be initialized with constant expressions, or with . Here, in this article, I try to explain Constants in C Language with Examples and I hope you enjoy this Constants in C Language with Examples article. Example. Octal constant (base 8) In the following code snippet, we have defined two constants. Constants in C with programming examples for beginners and professionals. A variable is an identifier which is used to store a value. C Programming Language supports different types of Operators. The above program can be written like this: accept integer or float value from user and print, check the number is positive, negative or zero, find the area of a triangle with three sides, take user input and display the values and print version of R, get the PHP version and configuration information, swap two numbers using temporary variable. Usually, it will be in the starting of the function after opening braces for local variables. C programs not only on simple characters, but also on special escape sequences. Constants in C with programming examples for beginners and professionals. For example (HelloWorld), here you can see HelloWorld is a sequence of characters that is enclosed between double quotes ( ) so, this is a String constant. Constants are also like normal variables. C programming language will allow only specific operation of a type constant. What are the different ways that 'if' statements can be written in C? Real part Numeric Constant Integer Numeric Constant Float or Real Numeric Constant Non-Numeric Constant (Character Constant) Single Character Constant String Character Constant Hexadecimal constant (base 16) Constants can be of any data type like int, char, etc. 'A'. Exponential part. Example: 021, 077, 033 etc. Different operator takes different number of operands to perform its task. They cannot be changed like variables can be changed in a program. What are Literals in C? . -0.22E-5 (Here, E-5 represents 10-5. . There are 3 types of integer constants: Decimal constants (0 1 2 3 4 5 6 7 8 9) For ex: 0, -9, 22 Octal constants (0 1 2 3 4 5 6 7) For ex: 021, 077, 033 Hexadecimal constants (0 1 2 3 4 5 6 7 8 9 A B C D E F) For ex: 0x7f, 0x2a, 0x521 A floating-point literal means a literal which contains a fractional or exponential number. Unary Operators Binary Operators Ternary Operators Unary Operators: Unary operators act on single Operand. Here is the list of all types of Constants supported in C language. So later on the program, you don't have to recall the value again and again. 'x' is a character constant and "x" is a string constant. Sizeof and Limits of Data Type in C Type Casting in C C - Control Statements Control Statements in C If Else Statements in C Language Nested If-Else Statement in C Switch Statements in C While Loop in C Nested While Loop in C Do While Loop in C For Loop in C Language Break Statement in C Language Continue Statement in C Language Also you will notice the narrow difference between literals and constants with the help of simple examples. There are 4 types of constants in C. Integer constants Character constants Real/Floating point constants String constants Image Courtesy By definition, a constant is a quantity that does not change throughout the execution of a program. The integers that are too big to fit into an int will be taken as long. 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