Maybe this short line enlightens you: 

$ perl -wle '$en = EN-1000-0003-3; print $en'
Argument "EN" isn't numeric in subtraction (-) at -e line 1.
-1006

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If not, read perlintro.

Perl 6 - second systems done right

In reply to Re: grep return the entire file not the line which matches by moritz
in thread grep return the entire file not the line which matches by vikashiiitdm

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