OS/2 Procedures Language 2/REXX


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EXIT





 >>----EXIT---+--------------+---;---------------><
              +--expression--+

EXIT is used to leave a program unconditionally. Optionally, EXIT returns 
a data string to the caller. The program is terminated immediately, even 
if an internal routine is currently being run.  If no internal routine is 
active, RETURN and EXIT are identical in their effect on the program that 
is being run. 
If you specify expression, it is evaluated and the string resulting from 
the evaluation is then passed back to the caller when the program 
terminates. 
Example: 

j=3
Exit j*4
/* Would exit with the string '12' */

If you do not specify expression, no data is passed back to the caller. If 
the program was called as an external function, this is detected as an 
error, either immediately (if RETURN was used), or on return to the caller 
(if EXIT was used). 
"Running off the end" of the program is always equivalent to the EXIT 
instruction, in that it terminates the whole program and returns no result 
string. 
Note:    The language processor does not distinguish between invocation as 
         a command on the one hand, and invocation as a subroutine or 
         function on the other. If the program was invoked through a 
         command interface, an attempt is made to convert the returned 
         value to a return code acceptable by the REXX caller.  The 
         returned string must be a whole number whose value will fit in a 
         16-bit signed integer (within the range -2**15 to 2**15-1).   

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