Using %0 ... %9 with OS/2 commands

Be aware that the strings %0 ... %9, when used with OS/2 commands in a 
REXX program, are replaced by the CMD.EXE with the name of the program 
(%0) and the parameters (%1 ... %9). 
Example:


 
/*                                                                    */
                    /* The lineout statement prints                   */
                    /*    %0 %1 %2 %3                                 */
                    /* to the screen                                  */
  call LineOut , "%0 %1 %2 %3"

                    /* The ECHO command prints                        */
                    /*   - the name of the CMD (%0)                   */
                    /*   - and the parameter 1 to 3 (%1 ... %3)       */
                    /* to the screen                                  */
  '@ECHO %0 %1 %2 %3'

The same is true for the names of environment variables enclosed in % used 
with OS/2 commands.

(see the sections Get the invocation syntax, Get the name of the MAIN 
program called, and Get the parameters as seen by CMD.EXE or Get the 
parameters as seen by CMD.EXE - 2 - for usage of this feature)