# How to perform simple calculations using Ruby

##### Created by **Will Ceolin**

##### Created on Feb 6, 20 - **Updated on May 10, 20**

Doing simple calculations in Ruby is similar to other programming languages. First of all, open your Interactive Ruby (IRB) environment.

## Sum

```
5+2
=> 7
```

## Subtraction

```
5-2
=> 3
```

## Multiplication

```
5*2
=> 10
```

## Division

```
10/2
=> 5
```

## Power

```
3**3
=> 27
```

## Square root

For calculating the square root of a number, you can use Ruby's module:

```
Math.sqrt(9)
=> 3.0
```