You need to fix $prefix = $allprefixes{$to} -- $allprefixes{$from}; A double negative sign is not valid in this statement.

I think you want a single minus sign for the exponent arithmetic. The final print needs some work as what it displays is misleading.

(You also need something like #!/usr/local/bin/perl as your first line.)

In reply to Re: syntax error at labmonkey.pl line 1, at EOF by apl
in thread syntax error at labmonkey.pl line 1, at EOF by theredqueentheory

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