Invoking a Subroutine

4.3 Invoking a Subroutine

Invoke a subroutine from within any expression by using the subroutine name (with the ampersand):^[7]

^[7] 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!

Sometimes, we refer to the invocation as calling the subroutine.