It works for me, 

$ perl -w -e'my$n1="-933";my$n2="-1039";my$dif=$n1-$n2;print $dif,$/'
106
$

[download]
Your error messages say directly that you have more characters than minus, plus and digits in your argument variables. The presence of "^\" at the start of each string is causing the problem, making the strings not look like numbers.

Figure out how the spurious characters are getting in and you'll find the solution.

After Compline,
Zaxo

In reply to Re: Subtracting Stringified Negative Numbers by Zaxo
in thread Subtracting Stringified Negative Numbers by monkfan

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