in reply to
Re: What makes good Perl code?
in thread What makes good Perl code?
I was thinking about what Marshall said about user input, and how the program should be tolerant of user input no matter what it is. I was looking for a way to change this:
IF: if($current && $resistance)
if($current =~ s/mA//i)
$current /= 1000;
print "Those aren't valid answers.\n";
print "Please type that again, will ya?\n";
print "Type the current of the circuit.\n";
print "Add mA at the end of your answer\n";
print "if your answer is in milliAmps.\n";
$current = <STDIN>;
print "Now type the resistance of the circuit.\n";
$resistance = <STDIN>;
I want a way for the else block to run if both the inputs don't have numbers in them. Perhaps with an elsif block? However, I'm not aware of anything that would do what I require. Maybe with an algorithm? I don't know of ANY algorithms at all except for the Fischer-Yates shuffle, and that's pretty useless nowadays, considering Perl has a shuffle command anyways. Anyone know of a way to test for a number in a variable?