DOUNTIL
Begins a group of operations you want to process until a condition is True. The ENDDO command marks the end of the group.
DOUNTIL
Cond (Comparison Expression)
Parameters
Cond
Required. The comparison expression is evaluated at the end of the execution of the group of commands between the DOUNTIL and the ENDDO . If the expression is False, the group of commands is executed again.
Remarks
DOUNTIL first evaluates the complete condition. If the condition is False, the group of statements up to the ENDDO will be executed and control passes back to the DOUNTIL command again. If the condition is True, control passes to the next operations to be processed following the associated ENDDO command.