Since I have nothing better to do this afternoon, and I'm just learning, too, I checked my Perl book and came up with this-- does it work? If not, why not?
#!/usr/bin/perl
use strict;
Print “enter a 4 digit number:\n”;
Test: {
my $number = <STDIN>;
chomp $number;
If $number !=~ /[0-9][0-9][0-9][0-9]/{
Print “try again – 4 digits\n”;
Redo TEST;
}
}
(I had to look in a couple of chapters of Perl by Example to get this. At least I'm using strict now, though.)
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