@priyamaity9/arrayutils-package/Utils_Package/isPrime.js

Useful utility functions for working with arrays

function isPrime(num) {
  if (num <= 1) return false;
  if (num === 2) return true;
  if (num % 2 === 0) return false;

  for (let i = 3; i <= Math.sqrt(num); i += 2) {
    if (num % i === 0) return false;
  }

  return true;
}

module.exports = isPrime;