In PL/1, a function procedure(programmer-specified or built-in), a procedure that is invoked by the appearance of one of its entry names in a function reference and which returns a value to the point reference.

 
  • 在PL/1语言中,一种函数过程(程序员规定的或内部的),在引用函数时,出现一个函数过程名就调用一次过程,并返回一个值给引用点。
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