Logical Operators in C

The logical operators are used to perform the logical operation on two operands or variables. e.g. AND operation, OR operation, NOT operation.

Logical AND ( && ): True, only if all operands / conditions are true, otherwise false.

suppose x = 10, and y = 0, then

x && y will return FALSE.

if all operands are non-zero, then it will returns TRUE.

Logical OR ( || ): True, if one or more operands/conditions are true, otherwise False.

suppose x = 10, and y = 0, then

x || y will return TRUE.

If all operands are zero, then it will returns FALSE.

Logical NOT ( ! ): True, only if operand is 0.

suppose y = 0, then

!y will return TRUE.

If operand is non-zero, it will returns FALSE.

Here is a C program to demonstrate logical operators

/**
 * To demonstrate logical operator in C
 */
#include<stdio.h>
int main ( int argc, char **argv )
{
   int x = 10;
   int y = 0;
   int z = 15;
   /* Logical AND */
   if ( x && y )
   {
      printf("Logical AND : TRUE\n");
   }
   else  
   {
      printf ("logical AND : FALSE\n");
   }
   /* Logical OR */
   if ( x || y )
   {
      printf("Logical OR : TRUE\n");
   }
   else  
   {
      printf ("logical OR : FALSE\n");
   }
   /* Logical NOT */
   if ( !y )
   {
      printf("Logical NOT : TRUE\n");
   }
   else  
   {
      printf ("logical NOT : FALSE\n");
   }
   return 0;
}     

Hope, it would be helpful !!

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