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Postings from October 2003
On Tue, 2003-10-07 at 17:41, Tels wrote:
> But why does
>
> perl -le "print +(81**3)**(1/3)"
>
> print 81 and not 80.99999999999999?
$ perl -le '$#="%.16g"; print +(81**3)**(1/3)'
80.99999999999999
perldoc perlvar says:
$OFMT
$# The output format for printed numbers. This vari-
able is a half-hearted attempt to emulate awk's
OFMT variable. There are times, however, when awk
and Perl have differing notions of what counts as
numeric. The initial value is "%.ng", where n is
the value of the macro DBL_DIG from your system's
float.h. This is different from awk's default
OFMT setting of "%.6g", so you need to set $#
explicitly to get awk's value. (Mnemonic: # is
the number sign.)
Use of $# is deprecated.
- Alex V.
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