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REPEAT - UNTIL

REPEAT - UNTIL statements can only be used in internal functions or procedures.  REPEAT - UNTIL statements provide logical operations in the same manner as in  IF - THEN - ELSE and CASE statements, but they are often somewhat more convenient, especially for looping operations.  The REPEAT - UNTIL statements are written in the same manner as in other high-level programming languages.  Note the REPEAT - UNTIL construct cannot be used in the main program or in Modules and Subprograms.  Here is a small function which uses REPEAT - UNTIL.

     FUNCTION SUMINV(X)

         SUMX:=0;  i:=0

         REPEAT

             i:=i+1

             SUMX:= SUMX+1/X^i

        UNTIL (i>10)

        SUMINV:=SUMX

     END

Note that EES internally changes Duplicate loops into Repeat-Until blocks during compilation in internal functions and procedures