Perl quiz
What does the following Perl script output? (See the comments for the answer.)
#!/usr/bin/perl
use strict;
use warnings;
my $priority = '0009';
print $priority + 1;
print "\n";
posted by md at 2:03 PM
1 Comments:
The answer: the program prints the number 10.
Perl is a loosely typed language. The interpreter "figures out" the type of the variable based on the context - when possible.
As another example, this code will produce a warning:
#!/usr/bin/perl
use strict;
use warnings;
my $priority = 'waterlily';
print $priority + 1;
print "\n";
Running the code we get:
username@host:~$ perl mytest.pl
Argument "waterlily" isn't numeric in addition (+) at jnk.pl line 7.
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