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Difference between External and Internal Subroutine

Updated May 18, 2018

External Subroutine vs. Internal Subroutine

Internal subroutines in the sense. subroutines which are defined and used in a same program.

external in the sense if you create a sub routine in one program and you're calling this subroutine in another program ..then this is external subroutine.

OR

The name itself implies the internal subroutines defined by form /perform.. can be called within the same prog in which they were declared.....external subroutines can be called outside the program.


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