Learning Perl: 4.2. Invoking a Subroutine

发布时间：2020-12-15 20:56:43 所属栏目：大数据来源：网络整理

导读：? 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 @_

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.

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