Learning Perl: 4.2. Invoking a Subroutine

 

4.2. Invoking a Subroutine Invoke a subroutine from within any expression by using the subroutine name (with the ampersand):[§] [§] And frequently a pair of parentheses, even if empty. As written, the subroutine inherits the caller's @_ value, which we'll be discussing shortly. So don't stop reading here, or you'll be writing code with unintended effects. &marine; # says Hello, sailor number 1! &marine; # says Hello, sailor number 2! &marine; # says Hello, sailor number 3! &marine; # says Hello, sailor number 4! Most often, we refer to the invocation as calling the subroutine.