Find the sum of consecutive whole numbers w/o using loop in JavaScript

Posted by Zlatev on Stack Overflow See other posts from Stack Overflow or by Zlatev
Published on 2010-05-16T08:28:48Z Indexed on 2010/05/16 8:30 UTC
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JavaScript

|

math

I'm looking for a method to do calculations like:

function sumIntegerUpTo(number) {
  return 1+2+3+...+number;
}

If you pass number as 5 function should return the sum of 1+2+3+4+5. I'm wondering if it's possible to do without loops.

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