Is the reversed number a prime number in JavaScript

Problem

We are required to write a JavaScript function that takes in a number and return true if the reverse of that number is a prime number, false otherwise.

Example

Following is the code −

 Live Demo

const num = 13; const findReverse = (num) => {    return +num    .toString()    .split('')    .reverse()    .join(''); }; const isPrime = (num) => {    let sqrtnum = Math.floor(Math.sqrt(num));    let prime = num !== 1;    for(let i = 2; i < sqrtnum + 1; i++){       if(num % i === 0){          prime = false;          break;       };    };    return prime; } const isReversePrime = num => isPrime(findReverse(num)); console.log(isReversePrime(num));

Output

true