0.9b (c) 1995 Peter Childs
As you become more skilled at programming, you may want to create procedures that do more and run more efficiently. Sometimes this means adding a special function to a procedure or calling a subroutine.
In this section, we shall see how these functions can help to build a better foundation in REXX.
Functions Perform a computation and return a result.
DATATYPE( ) An internal function that verifies that the data is a specific type.
SUBSTR( ) An internal function that selects part of a string.
CALL Causes the procedure to look for a subroutine label and begin running the instructions following the label.
REXX.CMD File Commands Treat commands as expressions.
Error Messages Tell you if the command runs correctly. If the procedure runs correctly, no message is displayed.
Inf-HTML End Run - Successful