It's not a good idea to declare a variable inside an if-block when you want to use it in the surrunding block - what happens if the if-condition is false and it's not executed?

The solution is to declare the variable in an outer scope: 

my $new_variable;

if ($condition){
    # initialize $new_variable here
} 

# far down below, you can still use $new_variable.

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In reply to Re: Global Variables by moritz
in thread Global Variables by kmullin

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