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# 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:

1. Arithmetic Operators

2. Relational Operators

3. Assignment Operators

4. 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.

• 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

!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;

ans=y++;

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

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

return (0);

}

Output:

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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