help - calculate natural numbers?

[wer0ckz]

Hi guys. help please.

 

How to  code few lines for small program that calculates the sum of the first 540 natural numbers. Start numbering from 0.

 

Is there a url tutorial about my issue?

 

Thanks

[kenrbnsn]

What do you mean by "natural numbers"? Whole numbers like 1,2,3, ... etc?

 

Ken

[Psycho]

http://www.9math.com/book/sum-first-n-natural-numbers

 

 

function sumOfNaturalNumbers($maxNum)
{
    return ($maxNum * ($maxNum + 1)) / 2;
}

$answer = sumOfNaturalNumbers(540);