old_contents: 'use strict'
   
   function getPrimes(num) {
    var primes = [2,3];
  
    var checkPrime = function(num) {
      var numIsPrime;
      for(var i = 2; i < num; i++){
             if(num % i === 0){
                 numIsPrime = false ;
                 break;
             }
             else {
              numIsPrime = true;
             }
        }
        return numIsPrime;
    }
  
    if (num < 0) {
      return "negative integers can not be prime";
    }
    else if (num === 1) {
      return '1 is not a prime number';  
    }
    else if (num === 2) {
      return [2];
    }
    else if (num === 3) {
      return primes;
    }
    else {
      for(var i = 4; i <= num; i++) {
            if(checkPrime(i) === true ){
                primes.push(i);
            }
      }
      return primes;
    }
  }
  
  module.exports = getPrimes;
new_contents: 'use strict'
   
   function getPrimes(num) {
    var primes = [2,3];
  
    var checkPrime = function(num) {
      var numIsPrime;
      for(var i = 2; i < num; i++){
             if(num % i === 0){
                 numIsPrime = false ;
                 break;
             }
             else {
              numIsPrime = true;
             }
        }
        return numIsPrime;
    }
  
    if (num < 0) {
      return "negative integers can not be prim";
    }
    else if (num === 1) {
      return '1 is not a prime number';  
    }
    else if (num === 2) {
      return [2];
    }
    else if (num === 3) {
      return primes;
    }
    else {
      for(var i = 4; i <= num; i++) {
            if(checkPrime(i) === true ){
                primes.push(i);
            }
      }
      return primes;
    }
  }
  
  module.exports = getPrimes;
subject: add remove e from prime on line 20