Having thought that one might be close to obtaining variable scope master in Perl such strange happenings presented today.

A while loop that never exits:

#!/usr/bin/perl
use strict;
while ( my $number != 10 ) {
        printf("Please, the number 10: ");
        $number = <STDIN>;
}
[download]

A program that does not compile:

#!/usr/bin/perl
use strict;
while ( $number != 10 ) {
        printf("Please, the number 10: ");
        $number = <STDIN>;
}
[download]

A while loop that works as expected:

#!/usr/bin/perl
use strict;
my $number;
while ( $number != 10 ) {
        printf("Please, the number 10: ");
        $number = <STDIN>;
}
[download]

While it is not my usual practice to program on a Wednesday, I have done so today. Could that be the reason or is there an other?

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