它具有非常特殊的用途:

It has very specific uses:

• &告诉Perl忽略潜艇的原型.
• &可以允许您使用呼叫者的@_. (&foo;，没有任何括号或参数).
• goto &foo;和defined &foo.
• 获取参考(例如\&foo).

• & tells Perl to ignore the sub's prototype.
• & can allow you to use the caller's @_. (&foo; with no parens or arguments).
• goto &foo; and defined &foo.
• Getting a reference (e.g. \&foo).

由于内置函数不能以&开头，因此某些人(大多数是初学者)使用它来区分用户子对象和内置函数.

Some people (mostly beginners) use it to distinguish user subs from builtin functions, since builtin functions cannot be preceded by &.