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Relational Operators in C


Relational Operators 
Relational operators are used for the comparison of two values to understand the type of relationship a pair of number shares. For example, less than, greater than, equal to, etc. Let’s see them one by one 
 

  1. Equal to operator: Represented as ‘==’, the equal to operator checks whether the two given operands are equal or not. If so, it returns true. Otherwise, it returns false. For example, 5==5 will return true.
  2. Not equal to operator: Represented as ‘!=’, the not equal to operator checks whether the two given operands are equal or not. If not, it returns true. Otherwise, it returns false. It is the exact boolean complement of the ‘==’ operator. For example, 5!=5 will return false.
  3. Greater than operator: Represented as ‘>’, the greater than operator checks whether the first operand is greater than the second operand or not. If so, it returns true. Otherwise, it returns false. For example, 6>5 will return true.
  4. Less than operator: Represented as ‘<‘, the less than operator checks whether the first operand is lesser than the second operand. If so, it returns true. Otherwise, it returns false. For example, 6<5 will return false.
  5. Greater than or equal to operator: Represented as ‘>=’, the greater than or equal to operator checks whether the first operand is greater than or equal to the second operand. If so, it returns true else it returns false. For example, 5>=5 will return true.
  6. Less than or equal to operator: Represented as ‘<=’, the less than or equal to operator checks whether the first operand is less than or equal to the second operand. If so, it returns true else false. For example, 5<=5 will also return true.

Examples: 

 

// C program to demonstrate working of relational operators
#include <stdio.h>
 
int main()
{
    int a = 10, b = 4;
 
    // greater than example
    if (a > b)
        printf("a is greater than b\n");
    else
        printf("a is less than or equal to b\n");
 
    // greater than equal to
    if (a >= b)
        printf("a is greater than or equal to b\n");
    else
        printf("a is lesser than b\n");
 
    // less than example
    if (a < b)
        printf("a is less than b\n");
    else
        printf("a is greater than or equal to b\n");
 
    // lesser than equal to
    if (a <= b)
        printf("a is lesser than or equal to b\n");
    else
        printf("a is greater than b\n");
 
    // equal to
    if (a == b)
        printf("a is equal to b\n");
    else
        printf("a and b are not equal\n");
 
    // not equal to
    if (a != b)
        printf("a is not equal to b\n");
    else
        printf("a is equal b\n");
 
    return 0;
}
 
 
Output:  
a is greater than b
a is greater than or equal to b
a is greater than or equal to b
a is greater than b
a and b are not equal
a is not equal to b