Logical operator

There are three logical operators in C language, &&, ||, !

Operator	Name	Description	Example
&&	'Logical AND' Operator	'AND' operator returns true if both the operands it operates on evaluates to true (non-zero), else return false	a && b returns true if both a and b are non-zero
||	'Logical OR' Operator	'OR' operator returns true if any of the operands it operates on evaluates to true (non-zero), else return false	a || b returns true if either a or b are non-zero
!	'Logical NOT' Operator	'NOT' operator is a unary operator (it operates only on one operand). It returns true if the operand is false and returns false if the operand is true	!a returns true if a is false. Else returns false

Examples of Logical Operators

#include <stdio.h>
 
int main(void) {
    int a = 5, b = 6;
    printf("(a == 5) && (b == 7) : %d\n", (a == 5) && (b == 7));
    printf("(a == 5) || (b == 7) : %d\n", (a == 5) || (b == 7));
    printf("!(a == 5) : %d", !(a == 5));
    return 0;
}
 
Output:
(a == 5) && (b == 7) : 0
(a == 5) || (b == 7) : 1
!(a == 5) : 0