# Creating a random number inside a range in JavaScript

To generate a random number in the JavaScript, you can just use default `random`

method on `Math`

object:

`Math.random();`

The above code will generate some random number between 0 and 1 (inclusive of 0, but not 1).

If you only want an integer out of the random method, use the `floor`

method of `Math`

object

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

But the above code will generate single integer, that's **0**.

## Generate a random number between 0 and 9(both inclusive)

As you know `Math.random()`

will give you a number between 0 and 0.999999...
So multiplying it with 10 will give a number between 0 and 9.99999....
Then use `Math.floor`

to convert the obtained number to integer i.e., the following code will give you any of the 10 integers from 0 to 9

`Math.floor(Math.random()*10)`

### Generate random number between 1 and 10

From the above code it's obvious that you can add 1 to it to generate a random number between 1 and 10.

```
Math.floor(Math.random()*10)+1
// or
Math.floor((Math.random()+1)*10)
```

Similarly `Math.floor(Math.random()*500)+1`

will give you a number between 1 and 500

**Use Math.ceil() to even simplify the expression:**

`Math.ceil(Math.random() * 10)`

If you use `Math.round(Math.random() * 10)`

, you will get any integer between 0 and 10, including both 0 and 10. So you can get any number out of 11 possible integers, if you use `Math.round`

.

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