1. print $var1."\n";
...
2. if($line =~ /$var1/m)
...
[download]

1. You might want to

print "$var1\n"; #similar look and obvious function
OR
print $var1, "\n"; #efficiency
[download]

The first looks like your other print usages and does the most obvious thing (prints the variable and a newline)

The second is a bit more efficient because there is no concatenation of 2 strings followed by a print of the result. print is a list operator which pops out its arguments one after the other, in this case $var1 followed with no space by "\n"

2. In the code sample (with that while) you should only get one line so I dont see a need for the /m modifier do do multiline matching.