As you can see from the above responses there are a few ways
to do it, but there are a couple of things to watch out
for if you decide to use the special Perl variable $.
which is its special behavior that arises when reading from the
the empty diamond operator (<>) and also when you localize the variable
itself.
Basically I am 99% sure you just want to increment a counter
and keep track of the line number yourself. Since the
file will open at the beginning and read one line each
time the while statement loops, a simple $line++ statement
inside that loop should be sufficient.
In addition to checking that open succeeded, I'd
also recommend adding \n to the end of your print statement..
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