Relational operators compare two values and produce an integer result. The result is 1 when the relationship is true and 0 when it is false.

#include <stdio.h>

int main()
{
    int a = 10;
    int b = 20;

    printf("a < b  : %d\n", a < b);
    printf("a > b  : %d\n", a > b);
    printf("a <= b : %d\n", a <= b);
    printf("a >= b : %d\n", a >= b);

    return 0;
}

Example Output #

a < b  : 1
a > b  : 0
a <= b : 1
a >= b : 0

Explanation #

The relational operators are:

For example:

a < b

compares 10 with 20. Since 10 is less than 20, the expression produces 1.

Similarly:

a > b

is false, so it produces 0.

The result of a relational operator has type int in C and is either 0 or 1.