# Fully Detailed Explanation of Different Operators of C Programming

An operator is a symbol that is used to perform specific mathematical operations or logical functions. C language provides different types of operators. Let us have a look at the following operators:

Arithmetic Operators

Relational Operators

Assignment Operators

Increment/Decrement Operators

**Arithmetic Operators**

These are used to perform mathematical calculations like addition, subtraction, multiplication, division, and modulus.

The following table shows all the arithmetic operators supported by the C language.

**+**Addition Adds two operands.**−**Subtraction Subtracts the second operand from the first.*****Multiplication Multiplies both operands.**/**Division Divides numerator by denominator.**%**Modulus Gives the remainder after an integer division.

**Relational Operators**

Relational operators are used to comparing the values of two variables in a C program.

The following table shows all the relational operators supported by C.

**==**__Is equal to__x==y; Checks if the values of two operands are equal or not. If yes, then the condition becomes true.**!=**__Is not equal to__x!=y; Checks if the values of two operands are equal or not. If the values are not equal, then the condition becomes true.**>**__Is greater than__x>y; Checks if the value of the left operand is greater than the value of the right operand. If yes, then the condition becomes true.**<**__Is less than__x<y; Checks if the value of left operand is less than the value of the right operand. If yes, then the condition becomes true.**>=**__Is greater than or equal to__x>=y; Checks if the value of the left operand is greater than or equal to the value of the right operand. If yes, then the condition becomes true.**<=**__Is less than or equal to__x<=y; Checks if the value of the left operand is less than or equal to the value of the right operand. If yes, then the condition becomes true.

**Logical Operators**

The following table shows all the logical operators supported by C.

**&&**Called__Logical AND__operator. If both the expressions evaluate to True, the result is True. If either expression is False, the result is False.**||**Called__Logical OR__Operator. If anyone of the two expressions or both expression is True, then the result is True.**!**Called__Logical NOT__Operator. It is used to reverse the logical state of its operand. If a condition is true, then Logical NOT operator will make it false.

**Logical AND (&&) **

false && false = False

false && true = False

true && false = False

true && true = True

**Logical OR (||) **

false || false = false

false || true = true

true || false = true

true || true = true

**Logical NOT (!) **

!false = True

!true = False

**Assignment Operators**

Assignment Operators are used to assigning values for the variables in C programs. The following table shows all the assignment operators supported by C.

**=**__x = y;__Simple assignment operator. Assigns values from right side operands to left side operand**+=**__x += y; {meaning x = x + y}__Add AND assignment operator. It adds the right operand to the left operand and assigns the result to the left operand.**-=**__x -= y; {meaning x = x - y}__Subtract AND assignment operator. It subtracts the right operand from the left operand and assigns the result to the left operand.***=**__x *= y; {meaning x = x * y}__Multiply AND assignment operator. It multiplies the right operand with the left operand and assigns the result to the left operand.**/=**__x /= y; {meaning x = x / y}__Divide AND assignment operator. It divides the left operand with the right operand and assigns the result to the left operand.**%=**__x %= y; {meaning x = x % y}__Modulus AND assignment operator. It takes modulus using two operands and assigns the result to the left operand.

**Increment/Decrement Operators**

C supports two unique operators: ++ and --.Both are unary operators

**++**__Increment operator__**x++;**Increment operator adds 1 to the value of the operand.**--**__Decrement operator__**x--;**Decrement operator subtracts 1from the value of the operand.

**Note: **Meaning needs only one operand.

**E.g.:** int m=5;

m++; {meaning m=m+1}

printf(“%d”, m);

**Output:** 6

**E.g.: ** int m=5;

m--; {meaning m=m-1}

printf(“%d”, m);

**Output:** 4

**Increment and decrement operators are further classified as prefix and postfix.**

The difference between prefix and postfix is observable when the result is stored in a variable and then printed.

**++var** or **--var** are prefix operators. {Prefix operators do the operation first and then passes the value}

**var ++** or **var --** postfix operators. {Postfix operators passes the value first and then does the operation}

**Example 1**:

*#include <stdio.h> *

*int main() *

*{ *

*int x=10, y=10, ans; *

*ans=++x; *

*printf("Prefix answer:%d",ans); *

*ans=y++; *

*printf("\nPostfix answer:%d",ans); *

*printf("\nValue of x:%d",x); *

*printf("\nValue of y:%d",y); *

*return (0); *

*} *

**Output: **

Prefix answer: 11

Postfix answer: 10

Value of x: 11

Value of y: 11

**Example 2**:

*#include <stdio.h> *

*int main () *

*{ *

*int x=4, y=5, ans; *

*ans=++x + y++; *

*printf("%d",ans); *

*return (0); *

*} *

**Output:** 11

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