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Basic
Switch Case
Goto
Operators
if Statement
Nested if
While Loop
For Loop
Array
Patterns
Excersises
Others



Logical Operators in C Program


The following table shows, how to use logical operators.

Operator Description Example
&& AND Operator. If both the operands are true, then condition becomes true. If A is true B is true then (A && B) is true.
|| OR Operator. If any one of the operands is true, then condition becomes true. If A is true B is false then (A || B) is true.
! NOT Operator. It is used to reverse the state.(true=>false,false=>true ) If A is true then !A is false.

Example : pgm.c

#include<stdio.h>
int main(){
  int a=10;
  int b=10;
  printf("\na==10&&b==10 : %d",a==10&&b==10);
  printf("\na==10&&b==20 : %d",a==10&&b==20);
  printf("\na==10||b==10 : %d",a==10||b==10);
  printf("\na==10||b==30 : %d",a==10||b==30);
  printf("\na==20||b==30 : %d",a==20||b==30);
  printf("\na!=11 : %d",a!=11);
  return 0;
}

Output:

a==10 && b==10 : 1
a==10 && b==20 : 0
a==10 || b==10 : 1
a==10 || b==30 : 1
a==20 || b==30 : 0
a != 11 : 1