REPEAT UNTIL command UNTIL expression Repeats a command until a certain condition is met. e.g. SET a= 5 REPEAT SEND " 013" a= a-1 UNTIL a= 0 Sends carriage returns and deducts 1 from the value of a until the value of a reaches 0. Note: The important difference between REPEATâ€¦ UNTIL loops and WHILEâ€¦ DOâ€¦ ENDWHILE loops is that REPEATâ€¦ UNTIL always executes the specified action at least once, and ceases to do so when a condition is met. By contrast, WHILEâ€¦ DOâ€¦ ENDWHILE checks for a condition before ever carrying out an action, so if the condition is not met, the action will not be executed at all.