# 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 generate an integer random number between 1(min) and 5(max).



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 parameter to its nearest integer in Downward direction of rounding i.e towards the lesser value.

Syntax:

Math.floor(value)

Example 2: This example generate random integer number between 1(min) and 100(max).



Output:

Random Number between 1 and 100: 87

Example 3: This example generate random whole number between 1(min) and 10(max) both inclusive.



Output:

Random Number between 1 and 10: 3

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