Logical Operators in C programming language combines multiple boolean expressions. If we want to check more than one condition, then we need **logical Operators**.

Logical Operators always produces boolean results, either TRUE(non-zero value) or FALSE(zero value).

There are 3 logical operators in C language AND(&&), OR(||) and NOT(!)

*For Example*

*"If Humidity is less than 10% and Temperature is more than 30 degree celsius"*

We can implement above mentioned condition using logical operator as follows:

if((Humidity < 10) && (Temperature > 30))

## Description of Logical Operators in C

**AND**: Returns true, If both operands are true otherwise false.**OR**: Returns false If both operands are false, otherwise true.**NOT**: Returns true if operand is false and Returns false if operand is true.

**Here is the truth table of Logical Operators**

A | B | A && B | A || B | !A |
---|---|---|---|---|

TRUE | FALSE | FALSE | TRUE | FALSE |

TRUE | TRUE | TRUE | TRUE | FALSE |

FALSE | TRUE | FALSE | TRUE | TRUE |

FALSE | FALSE | FALSE | FALSE | TRUE |

## C Program to show use of Logical Operators

#include<stdio.h> #include<conio.h> int main(){ int A = 10, B = 5; /*Using AND Logical Operator to combime two relational expressions */ if((A>B) && (B<7)){ printf("Logical Expression returned TRUE\n"); } else { printf("Logical Expression returned FALSE\n"); } getch(); return(0); }

Output

Logical Expression returned TRUE