I am using these suggestions to make my code read better. I updated the validation of inputs by using the die fuction. I updated the loop to include the "unless" condition( I thought this was a nice method.).

Next step, is to take user input for each Metal polygon to be drawn and make sure these dimensions are within the predetermined limits.

Then work on adding the dimensions of the via by user and test those against its limit.

finally, check that via are laid out within the dimensions of each Metal that sandwiches it.

I think I want to reference each Metal layer to a table when testing its limits by using a hash, What do you think?

I will need a bit more info on what you are trying to do in order to tell you what I think.

BTW, it is awkward to repeatedly test/trial-and-error a program which keeps asking user input from the command line. So, while testing your logic, perhaps you can hardcode some of those $input1, $input2. Or you can read them from a file (in this case you can test many different values), or if you are on a *nix command line printf "1\n5\n" | yourscript.pl or enter the values 1 and 5 in separate lines in myfile.txt and then cat myfile.txt | yourscript.pl

cat myfile.txt | yourscript.pl
[download]

Don't bother the cat. A simple I/O redirection is sufficient here:

yourscript.pl < myfile.txt
[download]

And as a bonus, the version without cat also works on Windows.

See also Re: Perl output and uniq.

Alexander

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Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)