Oh no, not that FAQ again.

Anyway, the best way to round to two decimals, is using sprintf: 

$units = sprintf "%.2f", $units*$p;

[download]
In case you don't like trailing zeroes (maybe you do), as in "124.00", you can get rid of them using 
$units =~ s/\.?0+$//;

[download]
turning "123.50" into "123.5", and "124.00" into "124".

Only do this when you know your number contains a decimal point.

In reply to Re: strange rounding by bart
in thread strange rounding by Anonymous Monk

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