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[0], range[1]);
      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'
]
raja
Published on 18-Sep-2020 13:25:46
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