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Calling Functions

• You can call functions before you declare them by using parenthesis after, or an "&" sign before, the name of the function.
• If you call a function after it is declared, you can omit the parenthesis and the ampersand:

  # function is called
  say_hi();
  # function is called again
  &say_hi;
  # ... lots of code ...
  # function is declared
  sub say_hi {
     print "Hello, world!\n";
  }
  # function is called a third time
  say_hi;
  

Offer Kaye. YAPC::Israel::2005.
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