epic math fail?

[Rifts]

I can not seem to figure out how to do this..

 

I just need to add 100+99+98+97+96...+1 

 

no you can not do 100! because that multiples them =]

 

 

[kenrbnsn]

How about a simple loop:

<?php
$total = 0;
for ($i=1;$i<101;++$i) {
   $total += $i;
}
echo $total;
?>

 

Ken

[PFMaBiSmAd]

Or -

<?php

$n = 100;

$total = $n * ($n + 1)/2;

echo $total;
?>

[Rifts]

<3 you both thanks

[Pikachu2000]

Or even:

<?php
$i = 99;
$num = 100;
while( $i > 0 ) {
$num += $i--;
}
echo $num;
?>

[ManiacDan]

Or:

array_sum(range(1,100));

 

PFMaBiSmAd is the most correct since that would be the fastest calculation, but there are plenty of ways to solve this problem.

 

-Dan