# Outputting a random number that falls in a certain range in JavaScript

JavascriptWeb DevelopmentFront End TechnologyObject Oriented Programming

#### JavaScript for beginners

Best Seller

74 Lectures 10 hours

#### Modern Javascript for Beginners + Javascript Projects

Most Popular

112 Lectures 15 hours

#### The Complete Full-Stack JavaScript Course!

Best Seller

96 Lectures 24 hours

We are required to write a JavaScript function that takes in a number, say n, and an array of two numbers that represents a range. The function should return an array of n random elements all lying between the range provided by the second argument.

Therefore, let’s write the code for this function −

## Example

The code for this will be −

const num = 10;
const range = [5, 15];
const randomBetween = (a, b) => {
return ((Math.random() * (b - a)) + a).toFixed(2);
};
const randomBetweenRange = (num, range) => {
const res = [];
for(let i = 0; i < num; ){
const random = randomBetween(range, range);
if(!res.includes(random)){
res.push(random);
i++;
};
};
return res;
};
console.log(randomBetweenRange(num, range));

## Output

The output in the console will be −

[
'13.25', '10.31',
'11.83', '5.25',
'6.28', '9.99',
'6.09', '7.58',
'12.64', '8.92'
]

This is just one of the many possible outputs.