Re^4: Padding with sprintf changing number

in reply to Re^3: Padding with sprintf changing number
in thread Padding with sprintf changing number

4887.15 cannot be stored accurately as a floating-point number, which is causing your issue.

Could it be that (at least part of) the problem is that the OP is expecting that sprint("%d", 488714.999) will return the string 488715 ?
It won't:

C:\>perl -le "print sprintf('%d', 488714.999);"
488714
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Cheers,
Rob

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Re^5: Padding with sprintf changing number (updated) by haukex (Archbishop) on Sep 24, 2021 at 14:44 UTC
~~Yes, it could also be that `$amt` is intentionally something like 4887.14999..., so my statement above may be a little too certain (edited).~~ That in Perl, rounding is often done with sprintf's `%f` instead of `%d` is a good point. Update: Wait a minute - OP says they did `$amt = sprintf("%.2f",$amt);` before the `$amt = $amt*100;`, so the issue is pretty certainly that `$amt` was first something that rounds to 4887.15, which can't be represented accurately, and assuming `$amt` is the same as `$amount` in the root node, the cause of the issue is pretty clear.	[reply] [d/l] [select]

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Re^5: Padding with sprintf changing number (updated)
by haukex (Archbishop) on Sep 24, 2021 at 14:44 UTC

~~Yes, it could also be that $amt is intentionally something like 4887.14999..., so my statement above may be a little too certain (edited).~~ That in Perl, rounding is often done with sprintf's %f instead of %d is a good point.

Update: Wait a minute - OP says they did $amt = sprintf("%.2f",$amt); before the $amt = $amt*100;, so the issue is pretty certainly that $amt was first something that rounds to 4887.15, which can't be represented accurately, and assuming $amt is the same as $amount in the root node, the cause of the issue is pretty clear.

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