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[Perl 6] redo demo.

cwchen | PRO | 10/06/17 03:12:36 AM UTC | 0 ⭐ | 922 👁️ | Never ⏰ | []
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loop {
    my $x = prompt("Enter a number: ");
    redo unless $x ~~ /\d+/;
    last;
}

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