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.