Cole Tuininga wrote:
Got a perl question for y'all. I rarely have to do anything with perl, and I'm sure perl has a good reason for behaving like the following, but heck if I can figure it out.
The perl cookbook suggestions using sprintf for rounding floats. This seemingly works fine:
[EMAIL PROTECTED]:~$ perl -e 'print sprintf( "%.2f\n", 0.562 )' 0.56 [EMAIL PROTECTED]: perl -e 'print sprintf( "%.2f\n", 0.567 )' 0.57
However, I'm extremely confused by the following:
[EMAIL PROTECTED]:~$ perl -e 'print sprintf( "%.2f\n", 0.565 )' 0.56
I don't have an answer, Cole, but the same happens in Python and I'd bet in C as well -- must be a convention of the printf routines:
Python 2.2.2 (#1, Mar 9 2003, 08:18:26) [GCC 3.2 20020927 (prerelease)] on cygwin Type "help", "copyright", "credits" or "license" for more information. >>> print "%.2f\n" % 0.562 0.56
>>> print "%.2f\n" % 0.567 0.57
>>> print "%.2f\n" % 0.565 0.56
Erik
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