Recursion JavaScript issue

Question

const sequenceSum = (begin, end) => {
  // BEGIN (write your solution here)
  if (begin === end) {
    return end;
  } else if (begin > end) {
    return NaN;
  }

  return end + sequenceSum(end-1);
  // END
};

export default sequenceSum;

Hello. I don't the understand problem with the above code. I've got the following error:

RangeError: Maximum call stack size exceeded

Looks like the recursion never stops. How exactly, i.e. with what arguments, do you call that function? — str
– str, Commented Jul 19, 2017 at 6:29

guest271314 · Accepted Answer · 2017-07-19 06:31:07Z

3

You do not provide second parameter to function call at return end + sequenceSum(end-1) resulting in neither if nor if..else statement being reached, as end is not defined; instead return end + sequenceSum(end-1) is called repeatedly.

answered Jul 19, 2017 at 6:31

guest271314

1

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1 Comment

Vladimir Over a year ago

Yea, thank you! return end + sequenceSum(begin, end-1); :)

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