Sum All Primes

index.js

/*
Sum all the prime numbers up to and including the provided number.

A prime number is defined as a number greater than one and having only two divisors, one and itself. For example, 2 is a prime number because it's only divisible by one and two.

The provided number may not be a prime.

*/

function sumPrimes(num) {
  var primes = [];

  for (var j = 2; j <= num; j++) {
    if (isPrimeNumber(j)) {
      primes.push(j);
    }
  }

  function isPrimeNumber(num) {
    for (var i = 2; i < num; i++) {
      if (num % i === 0) {
        return false;
      }
    }

    return true;
  }
  console.log(primes);
  return primes.reduce(function(a, b) {
    return a + b;
  });
}

sumPrimes(977);

/*
test your code here
sumPrimes(10) should return a number.
sumPrimes(10) should return 17.
sumPrimes(977) should return 73156.

*/