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# How to generate random number in given range using JavaScript ?

A number generated by a process, whose outcome is unpredictable is called Random Number. In JavaScript, this can be achieved by using Math.random() function. This article describes how to generate a random number using JavaScript

Method 1: Using Math.random() function: The Math.random() function is used to return a floating-point pseudo-random number between range [0,1), 0 (inclusive), and 1 (exclusive). This random number can then be scaled according to the desired range.

Syntax:

`Math.random();`

Example 1: This example generates an integer random number between 1(min) and 5(max).

## JavaScript

 `// Function to generate random number``function` `randomNumber(min, max) {``    ``return` `Math.random() * (max - min) + min;``}` `console.log(``"Random Number between 1 and 5: "``)` `// Function call``console.log( randomNumber(1, 5) );`

Output:

`Random Number between 1 and 5: 1.0573617826058959`

Method 2: Using Math.floor() function: The Math.floor() function in JavaScript is used to round off the number passed as a parameter to its nearest integer in the Downward direction of rounding i.e. towards the lesser value.

Syntax:

`Math.floor(value)`

Example 1: This example generates a random integer number between 1(min) and 100(max).

## JavaScript

 `// Function to generate random number``function` `randomNumber(min, max) {``    ``return` `Math.floor(Math.random() * (max - min) + min);``}` `console.log(``"Random Number between 1 and 100: "``)` `// Function call``console.log( randomNumber(1, 100) );`

Output:

`Random Number between 1 and 100: 87`

Example 2: This example generates a random whole number between 1(min) and 10(max) both inclusive.

## JavaScript

 `// Function to generate random number``function` `randomNumber(min, max) {``    ``min = Math.ceil(min);``    ``max = Math.floor(max);``    ``return` `Math.floor(Math.random() * (max - min + 1)) + min;``}` `console.log(``"Random Number between 1 and 10: "``)` `// Function call``console.log( randomNumber(1, 10) );`

Output:

`Random Number between 1 and 10: 3`