CODEWITHSUNDEEP
perl
learner
learner

Reputation: 375

Invoking perl subroutines

which is a better approach invoking perl subroutines using a '&' or something like below

checkValueExists($value);


sub checkValueExists{

my $value=@_;

#further code

}

Second approach Invoke sub using

&checkValueExists($value);

Upvotes: 0

Views: 72

Answers (2)

pndc
pndc

Reputation: 3805

More than you ever needed to know about Perl subroutines is in the perlsub man page, but the simple answer is that &foo is a Perl4-ism, and is rarely used in Perl5.

As another commenter has noted, it disables prototypes. & is also used if you need to take a reference to a subroutine \&foo, or if you need to call such a reference &$foo. These are more advanced Perl features that you're not likely to need yet if you're asking such a relatively basic question.

Upvotes: 1

ikegami
ikegami

Reputation: 386601

& is an instruction to ignore the prototype. It's not likely to be something you'll ever need to do. It makes no sense to use it here as the sub has no prototype, and there would be no reason to override it if it had one.

Upvotes: 5

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