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Outputting a random number that falls in a certain range in JavaScript
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[0], range[1]);
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.
Updated on: 21-Oct-2020
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