# Generating n random numbers between a range - JavaScript

JavascriptWeb DevelopmentFront End TechnologyObject Oriented Programming

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.

## Example

Following is the code −

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

This will produce the following output in console −

[
'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.

Let us run again to get a different random output −

[
'5.29', '7.95',
'11.61', '7.83',
'10.56',  '7.48',
'12.96',  '6.92',
'8.98', '9.43'
]