Determine if a number is prime

prime.js

// Return zero if the number isn't prime
function isPrime(value) {
  for (var i = 2; i < value; i++) {
    if (value % i === 0) {
      return false;
    }
  }
  return true;
}

// Print all prime numbers up until the limit when it's complete
function printPrime(value) {
  var primes = [];
  for (var i = 2; i < value; i++) {
    primes[i] = true;
  }
  var limit = Math.sqrt(value);
  for (var i = 2; i < limit; i++) {
    if (primes[i] === true) {
      for (var j = i * i; j < value; j += i) {
        primes[j] = false;
      }
    }
  }
  for (var i = 2; i < value; i++) {
    if (primes[i] === true) {
      console.log(i + " " + primes[i]);
    }
  }
}