# How to generate random numbers in JavaScript

**by Sai gowtham1min read**

In this tutorial, we are going to learn how to generate random numbers in javascript by using `Math.random()`

method.

By default `Math.random()`

method generates a floating point number between 0 to 1 (inclusive of 0, but not 1).

`Math.random();`

We don’t need floating point numbers so that by using `Math.floor( )`

method we floor it down to a decimal number.

`Math.floor(Math.random());`

### Let’s generate random numbers ranging between 1- 10.

`Math.floor(Math.random()*10) //random numbers 0-9`

The above code only generates random numbers between 0 –9. But we need random numbers between 1–10.

`Math.floor(Math.random()*10)+1; //random numbers 1-10`

### 1–100 random numbers

`Math.floor(Math.random()*100)+1; //random numbers from 1-100`

Happy coding…