Dunno if it matters, but 

0 + 1 + 2 + .. + ($n-1)

[download]

can be calculated using 

$n * ($n-1) / 2

[download]

So 

( 0 + 1 + 2 + .. + ($n-1) ) / $n

[download]

is simply 

($n-1) / 2

[download]

In reply to Re^3: A script with a loop is running my computer Out of memory by ikegami
in thread A script with a loop is running my computer Out of memory by Lady_Aleena

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