# Common JavaScript Manual/Logic and Comparison operators

## Logic operators[edit]

There are three logical operators in JavaScript. It are "not","and","or". Let's see example.

Operator | Action |
---|---|

|| | or |

&& | and |

! | not |

```
!true; // False
!false; // True
false || true; // True
false && true;// False
```

## Comparison operators[edit]

In parts of the previous file you've already seen some of these operators, and certainly understand their meaning but in anyway. There are 8 comparison operators in JavaScript.

Operator | Condition |
---|---|

== | Equal |

!= | Not equal |

=== | Equal value and type |

!== | Not equal value or type |

> | More |

< | Less |

<= | Less or equal |

>= | More or equal |

And for example:

```
5 == 5; //True
5 === '5'; //False
5 != 3; //True
5 !== '3'; //True
5 > 3; //True
5 < 3; //False
5 <= 5; //True
5 >= 3; //True
```

## XOR Hack[edit]

In JavaScript there is no operator XOR (also named Exclusive OR). But we can write function that use bitwise XOR and return booleadn XOR of two arguments.

```
xor = function(a,b){
return Boolean(a ^ b)
}
```

And let's use it.

```
xor(true,false); //True
xor(true,true); //False
xor(false,false); //False
```