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Re^2: perl floating number addition

by Albannach (Prior)
on Jul 18, 2009 at 13:49 UTC ( #781324=note: print w/ replies, xml ) Need Help??


in reply to Re: perl floating number addition
in thread perl floating number addition

A (pretty common) nit to pick here: the 3 in %3.2f is not the number of digits before the decimal, it's the minimum total width of the resulting field, including the decimal. So if you really want 3 digits, a decimal and 2 digits, then you need %6.2f. This is a minimum and the digits to the left of the decimal will still be printed, so your example of 895.3 still appears to work (even though it would be better described as %5.1f), but try that in a table and you'll find that the column won't line up when another value is just 1.23 for instance.

For illustration, printf("%3.2f\n",$_) for (3.2,32.2,322.2) gives:

3.20 32.20 322.20

while printf("%6.2f\n",$_) for (3.2,32.2,322.2) gives:

3.20 32.20 322.20

--
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Re^3: perl floating number addition
by biohisham (Priest) on Jul 18, 2009 at 14:12 UTC
    Thanks buddy for this, I will have it rectified, when I saw the start of your reply and I was like aoooo I mixed up some other coordinates system from another utility. Thanks, I admit I fell for the trap, I will make an update.
    Excellence is an Endeavor of Persistence. Chance Favors a Prepared Mind

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