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Learning Perl, 5th Edition
book

Learning Perl, 5th Edition

by Randal L. Schwartz, Tom Phoenix, brian d foy
June 2008
Beginner content levelBeginner
352 pages
11h 16m
English
O'Reilly Media, Inc.
Content preview from Learning Perl, 5th Edition

Invoking a Subroutine

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

&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 simply calling the subroutine.

[] 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!

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Publisher Resources

ISBN: 9780596520106Supplemental ContentErrata Page