Operators are simply some functions having a arithmatic, logical or bitwise property. To start with, we will to through arithmetic operators first as we know maths.

Operator | Property |
---|---|

+ | Addition |

- | Substraction |

* | Multiplication |

\ | Division |

% | Mod |

= | Assignment |

++ | Increment |

-- | Decrement |

We are quite familiar with some of the operators but we'll learn each on in detail.

```
var num1 = 10;
var num2 = 20;
var total = num1+num2; //total = 20
```

Here, total will hold the value of sum of the numbers.

```
var num1 = 10;
var num2 = 20;
var total = num1-num2; //total = -10
```

Here, total will hold the value of difference of the numbers, with sign, (-) in this case.

```
var num1 = 10;
var num2 = 20;
var total = num1*num2; //total = 200
```

Here, total will hold the value of multiplication of the numbers.

```
var num1 = 10;
var num2 = 20;
var total = num1/num2; //total = 0.5
```

Here, total will hold the value of quotient. 0.5 in this case.

```
var num1 = 10;
var num2 = 20;
var total = num1%num2; //total = 10
```

Here, total will hold the value of remainder.10 in this case.

```
var num1 = 10;
var num2;
var num2 = num1; //num2 = num1 = 10
```

Here, num2 will hold the value of num1. The assignment is done from right to left hand side. Simple Maths, isn't it.

```
var num = 10;
var total = num++; //total = 11
var total = num+=4; //total = 11+4 = 15
```

Increment operator is just like addition, but used when you need to add a numeric value to the variable itself.

```
var num = 10;
var total = num--; //total = 9
var total = num-=2; //total = 9-2 = 7
```

Increment operator is just like substraction, but used when you need to substract a numeric value from the variable.

**Note** - You can also use increment/decrement with mulitiplication, division and modulus operators as well. Try this in the browser.

Unlike arithmatic operators, + is the only operator which is used to concatinate 2 or more strings together.

```
var first = "Fname";
var last = "Lname";
var name = first + " " + last; //Fname Lname
```

```
var first = "Fname";
var name +=" Lname"; //Fname Lname
var name = first + " Lname"; //Fname Lname
```

In Javascript you can add numbers and strings together and the output will be a string.

```
var number = 10;
var name = 'Name';
var result = number+name; //10name
result = name+number; //name10
```

Operator | Property |
---|---|

== | Equal to |

!= | Not Equal to |

=== | Equal to and equal type |

!== | Equal to not equal type |

> | Greater than |

< | Less than |

>= | Greater than equal to |

<= | Less than equal to |

Operator | Property |
---|---|

&& | Logical and |

|| | Logical or |

! | Logical not |

We will go through these operators in more details in the next section when we will cover conditional statements.

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