Or, if 0 is a valid value for the input to the subroutine (ie., you don't want to set $inputValue to the default if 0 is the arg), use: 
my $inputValue = defined $_[0] ? $_[0] : "default value";

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In reply to Re: Checking for Arguments before Usage? by btrott
in thread Checking for Arguments before Usage? by nickcave25

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