in reply to Input/Output through the Keyboard
The keyboard input is captured on STDIN:
#!/usr/bin/perl use warnings; use strict; my $input; print("Your number: "), chomp( $input = <STDIN> ) until $input =~ /^\d+$/; print 3 * $input - 1, $/;
The print, chomp sequence uses the comma operator to make the two part of a single expression for the modifier. The alternative is do { print... ; chomp ...;} until ...;.
After Compline,
Zaxo
In Section
Seekers of Perl Wisdom