by Sai gowtham

How to generate random numbers in JavaScript

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();

mathrandom

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());

mathfloor

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

1-10 random numbers

1–100 random numbers

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

Happy coding…

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