# Relational Operators in C

The following table shows all the relational operators supported by C language. Assume variable A holds 10 and variable B holds 20 then −

Operator Description Example
== Checks if the values of two operands are equal or not. If yes, then the condition becomes true. (A == B) is not true.
!= Checks if the values of two operands are equal or not. If the values are not equal, then the condition becomes true. (A != B) is true.
> Checks if the value of left operand is greater than the value of right operand. If yes, then the condition becomes true. (A > B) is not true.
< Checks if the value of left operand is less than the value of right operand. If yes, then the condition becomes true. (A < B) is true.
>= Checks if the value of left operand is greater than or equal to the value of right operand. If yes, then the condition becomes true. (A >= B) is not true.
<= Checks if the value of left operand is less than or equal to the value of right operand. If yes, then the condition becomes true. (A <= B) is true.

## Example

Try the following example to understand all the relational operators available in C −

```#include <stdio.h>

main() {

int a = 21;
int b = 10;
int c ;

if( a == b ) {
printf("Line 1 - a is equal to b\n" );
} else {
printf("Line 1 - a is not equal to b\n" );
}

if ( a < b ) {
printf("Line 2 - a is less than b\n" );
} else {
printf("Line 2 - a is not less than b\n" );
}

if ( a > b ) {
printf("Line 3 - a is greater than b\n" );
} else {
printf("Line 3 - a is not greater than b\n" );
}

/* Lets change value of a and b */
a = 5;
b = 20;

if ( a <= b ) {
printf("Line 4 - a is either less than or equal to  b\n" );
}

if ( b >= a ) {
printf("Line 5 - b is either greater than  or equal to b\n" );
}
}
```

When you compile and execute the above program, it produces the following result −

```Line 1 - a is not equal to b
Line 2 - a is not less than b
Line 3 - a is greater than b
Line 4 - a is either less than or equal to  b
Line 5 - b is either greater than  or equal to b
```
c_operators.htm