Simple DO

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You may bracket a group of statements with a simple DO and ENDDO combination. No executable statements are generated, only the labels that allow the use of ITERATE and ASMLEAVE macros.

A simple DO is coded by either using the ONCE parameter:

        DO  ONCE
          Code for DO group
        ENDDO

or by omitting all parameters:

        DO   ,
          Code for DO group
        ENDDO

This will generate the same code:

        DO   ,
+#@LB1    DC    0H
          Code for DO group
        ENDDO