in reply to Re^6: Getting different results with $var++ and $var += 1
in thread Getting different results with $var++ and $var += 1

I'm using Math::BigInt in this package

Which makes it a little easier to demonstrate how some of those NaN values might arise: 
C:\>perl -MMath::BigInt -le "$x=Math::BigInt->new(123);$x += 'str';pri
+nt $x"
NaN

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Cheers,
Rob

In Section Seekers of Perl Wisdom