check the ***magic*** $., man perlvar

       HANDLE->input_line_number(EXPR)
       $INPUT_LINE_NUMBER
       $NR
       $.      Current line number for the ***last filehandle*** acces
+sed.

[download]

Actually it's a bit more magic than you might like, in which case doing it yourself might be safer when using multiple input handles in a program.

In reply to Re: print a determinate line number by jakobi
in thread print a determinate line number by Paulux

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