# Javascript Comparisons

In this chapter we will learn about Comparison.

As we have told, the **Comparisons** are operators for determine equality or difference between variables or values.

I'm sure you have seen a thing like this. For example **y = 10**. This operator is **not** comparison. It's for setting value to a given variable.

**Let's look at the table, to know which type of comparisons there are.**

Operator | Description | Comparing | Returns |
---|---|---|---|

== | equal to |
x == 8 x == 5 |
false true |

=== | equal value and equal type |
x === "5"
x === 5 |
false true |

!= | not equal | x != 8 | true |

!== | not equal value or not equal type |
x !== "5" x !== 5 |
true false |

> | greater than | x > 8 | false |

< | less than | x < 8 | true |

>= | greater than or equal to | x >= 8 | false |

<= | less than or equal to | x <= 8 | true |

## How to use it?

The Comparison is used to compare any values and do something depending on the result.

```
if (speed > 120){
variable = "Is very fast";
}
```

## Logical Operators

Logical operators are operators to determine a logic of 2 values. Let's set values to the variables: **x = 10, y = -8**.

There are 3 Logical operators.

- && (and) -- (x > 5 && y < -7) is true
- || (or) -- (x > 10 || y == 9) is false
- ! (not) -- !(x > y) is false

## Conditional Operator

Conditional Operator is very useful syntax for programmer. It's very correct code style.

variableName = condition ? value1 : value2 // value1, when condition is true, value2 when condition is false

`var name = girl ? 'Ani' : 'Tigran';`

## Operator for Bits

As you know the programming is based on {0,1} and every programming language has operators to work with bits. Javascript has these operators too.

Operator | Description | Example | Same as | Result | Decimal |
---|---|---|---|---|---|

& | AND | x = 5 & 1 | 0101 & 0001 | 0001 | 1 |

| | OR | x = 5 | 1 | 0101 | 0001 | 0101 | 5 |

~ | NOT | x = ~ 5 | ~0101 | 1010 | 10 |

^ | XOR | x = 5 ^ 1 | 0101 ^ 0001 | 0100 | 4 |

<< | Left shift | x = 5 << 1 | 0101 << 1 | 1010 | 10 |

>> | Right shift | x = 5 >> 1 | 0101 >> 1 | 0010 | 2 |