C Programming - Operators - Relational operators

Relational operators

Relational operators are used to compare the value of two variables.
Operators
Operator
Use
==
Check value of 2 variable are equal
!=
Check value of 2 variable are equal or not
>
check is value is greater than
>=
check is value is greater than or equal to
<
check value is less than
<=
check value is less than or equal to
Example :
#include <stdio.h>

int main()
{
    int a = 21;
    int b = 10;
    int c ;

    // == operator
    if( a == b )
    {
        printf("a is equal to b\n" );
    }
    else
    {
        printf("a is not equal to b\n" );
    }

    // < operator
    if ( a < b )
    {
        printf("a is less than b\n" );
    }
    else
    {
        printf("a is not less than b\n" );
    }

    // > operator
    if ( a > b )
    {
        printf("a is greater than b\n" );
    }
    else
    {
        printf("a is not greater than b\n" );
    }

    // Lets change value of a and b
    a = 5;
    b = 20;
    // <= operator
    if ( a <= b )
    {
    printf("a is either less than or equal to  b\n" );
    }


    // >= operator
    if ( b >= a )
    {
        printf("b is either greater than  or equal to b\n" );
    }

    return 0;
}
Output :
    a is not equal to b
    a is not less than b
    a is greater than b
    a is either less than or equal to  b
    b is either greater than  or equal to b