Get number of primes

by Matthew Day

JavaScript

function isPrime(num) {
  let _arr = [];
  if (num === 1) {
  	return false;
  }
  for(let i = 1; i <= num; i++) {
  	if (num % 2 === 0 && num !== 2) {
      return false;
    } else if (num % i === 0 && _arr.indexOf(i) < 0) {
    	_arr.push(i);
    }
  }
  if (_arr.length > 2) {
    return false;
  } else {
    return true;
  }
}

function getPrimes(num) {
	let _arr = [];
  let i = 2;
  while (_arr.length < num) {
  	if (isPrime(i)) {
    	_arr.push(i);
    }
    i++;
  }
  return _arr;
}

console.log(getPrimes(1));