C - Logical Operators

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C Logical Operators - Definition and Usage

In C-Programming the logical operators are used for defining the logical operation.
Generally, there are three logical operators in c language.

logical AND (&&)
logical OR (||)
logical NOT (!)

Operators	Name	Example	Description
&&	logical AND	(x>5)&&(y<5)	It returns true when both conditions are true
\|\|	logical OR	(x>=10)\|\|(y>=10)	It returns true when atleast one of the condition is true
!	logical NOT	!((x>5)&&(y<5))	It reverses the state of the operand “((x>5) && (y<5))”If “((x<5) && (y<5))” is true, logical NOT operator makes it false

Sample - C Code

#include <stdio.h>
#include <conio.h>
void  main()
{
    int m=40,n=20;
    int o=20,p=30;
    if (m>n && m !=0)
    {
        printf("&& Operator : Both conditions are true\n");
    }
    if (o>p || p!=20)
    {
        printf("|| Operator : Only one condition is true\n");
    }
    getch();
}

C Code - Explanation

In this statement we are using the logical operator AND(&&) if both conditions are true. Here m>n condition will be satisfied because m=40 and n=20 and the next condition is that m not equals to “0” is satisfied so the print statement prints the output as “&& operator: Both condition is true” .
In this statement we are using the logical operator OR (||) so only one condition is satisfied. Here o>p condition will not be satisfied because o=20 and p=30 and also the next condition “m” is not equals to “20” so the print statement prints the output as “||operator: only one condition is true” .

Sample Output - Programming Examples

Here in this output the “if” condition satisfy both condition so output will be displayed as “&& Operator: Both conditions are true” in the output window.
Here in this output the “if” condition satisfy only one condition so output will be displayed as “|| Operator: Only one condition is true” in the output window.

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C - Logical Operators