To make this work completely

In such loops I prefer to limit the scope of $line but this might not concern you.

#!usr/bin/perl
use strict;
use warnings;

while (my $line = <DATA>) {
    last unless $line =~ /\S/;
    print "Read: $line";
}

__DATA__
do a thing with non blank line
do a thing with non blank line
last one
  
no action on this line
nor this

[download]

In reply to Re^4: First attempt at bringing in file for input/output by hippo
in thread First attempt at bringing in file for input/output by catfish1116

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