Logical Operators

2 min read Updated June 30, 2026

AND,OR operators are used when we want to use two or more Conditions.

Types Of Logical Operators

&& Logical AND
|| Logical OR
! Logical NOT

Logical And (&&) Operator

Logical And Operator Definition

If both the operations are successful, then the condition becomes true.

Logical And Operator Syntax

expr1 && expr2

Logical And Operator Syntax Example

if( (a>10) && (a<20) )
  printf(?A is in-between of 10 and 20?);

Logical And Operator Example Program

/*  Example Program For Logical And operator In C Programming Language
    little drops @ thiyagaraaj.com
    Coded By:THIYAGARAAJ MP             */

// Header Files
#include<stdio.h>
#include<conio.h>

//Main Function
int main()
{
	// Variable Declaration
    int num1 = 30;
    int num2 = 40;

    if(num1>=40 && num2>=40){
        printf("Example of Logical And operator");
    }

	// Wait For Output Screen
	getch();

	//Main Function return Statement
	return 0;
}

Sample Output:

Example of Logical And operator

Logical OR (||) Operator

Logical OR Operator Definition

If any one of the operations are successful, then the condition becomes true

Logical OR Operator Syntax

expr1 || expr2

Logical OR Operator Syntax Example

if( (a>10) || (a<20) )
  printf(?A is greater than 10 or less than 20?);

Logical OR Operator Example Program

/*  Example Program For Logical Or (||) operator In C Programming Language
    little drops @ thiyagaraaj.com
    Coded By:THIYAGARAAJ MP             */

// Header Files
#include<stdio.h>
#include<conio.h>

//Main Function
int main()
{
	// Variable Declaration
    int num1 = 30;
    int num2 = 40;

    if(num1>=40 || num2>=40){
        printf("Example of Logical Or operator");
    }

	// Wait For Output Screen
	getch();

	//Main Function return Statement
	return 0;
}

Sample Output

Example of Logical OR operator

Logical NOT (!) Operator

Logical NOT Operator Definition

It is used to reverse the condition of result. That is, if a condition is true, Logical NOT operator reverses the result and produces output as false.

Logical NOT Operator Syntax

!expression

Logical NOT Operator Syntax Example

if( !(a>10)
  printf(?A is less than 10 ?);

Logical Not Operator Example Program

/*  Example Program For Logical Not (!) operator In C Programming Language
    little drops @ thiyagaraaj.com
    Coded By:THIYAGARAAJ MP             */

// Header Files
#include<stdio.h>
#include<conio.h>

//Main Function
int main()
{
    int number;

    printf("Please enter an integer value: ");
    scanf("%d", &number);

    if(!(number>40)){
        printf("Input check greater than 40 - TRUE");
    }else{
        printf("Input check greater than 40 - FALSE");
    }

	// Wait For Output Screen
	getch();

	//Main Function return Statement
	return 0;
}

Sample Output

Please enter an integer value: 35
Input check greater than 40 - FALSE

Continue learning with these related tutorials and programs:

C Tutorials — Browse all C Tutorials.
C Operators — Overview — all C operator categories.
Arithmetic Operator Example Program In C — More in c operators.
Relational Operators — More in c operators.

Frequently Asked Questions

What does this C program do?

It is a C example program that demonstrates Logical Operators, including the complete source code and the expected sample output.

How do I compile and run this C program?

Save the code in a `.c` file, compile it with `gcc filename.c -o program`, then run it with `./program` (or `program.exe` on Windows).

What concepts does this example use?

This example uses conditional logic, reading user input and user-defined functions, illustrating a common pattern in C programming.

Logical Operators