Question
What is the difference between a function subprogram and a subroutine?
Answers
The biggest difference is that a subroutine never returns a value that is associated with its name. This means that you never need to declare a subroutine name in a type statement (REAL, INTEGER ...). All information coming back from a subroutine passes through the argument list, or something called a COMMON block (later). However, there is nothing in these communications channels that can't be used by a Function Subprogram. A secondary difference is that a Subroutine need not have an argument list.   Your Comment




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