Intermediate Algorithm Scripting - Sum All Primes

Tell us what’s happening:
Describe your issue in detail here.
my code returns 18 when it is supposed to return 17. I want to know where is the error in my code.

Your code so far

function sumPrimes(num) {
  function checkPrimes(number){
    for(let i = 2; i< number; i++){
      if(number % i === 0) return false;
    }return true;
  let answer=0;
  for(let j=0; j<= num; j++){
      answer += j;
  return answer;


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Challenge: Intermediate Algorithm Scripting - Sum All Primes

Link to the challenge:

Sorry, my previous answer was not clear enough…
Your checkPrimes function returns true for the value 1, because your i loop starts at 2, so discounts all values below this from the check.
A simple way of solving this would be to start your j loop from 2 also…

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