Bonfire: Sum All Primes

bonfire-sum-all-primes.js

// Bonfire: Sum All Primes
// Author: @clive-bunting
// Challenge: http://www.freecodecamp.com/challenges/bonfire-sum-all-primes#
// Learn to Code at Free Code Camp (www.freecodecamp.com)

function sumPrimes(num) {
  var primes = [];
  for (var trial = 2; trial <= num; trial++) {
    var isPrime = true;
    for (var prime = 0; prime < primes.length; prime++) {
      if (trial % primes[prime] === 0) {
        isPrime = false;
        break;
      }
    }
    if (isPrime) {
      primes.push(trial);
    }
  }
  return primes.reduce(function(a,b) {return a + b;});
}

sumPrimes(10);