PERFORM WITH UNTIL OPTION:
The format is as shown below:
A) Perform p-3 until i > 5.
Here p-3 will be executed whenever i <= 5. Whenever the condition fails it executes p-3 and if the condition turns out to be true it skips p-3.
B) Perform p-2 thru p-4 until k > n.
It is alike to the former illustration. All the paragraphs from p-2 to p-4 will be executed till the particular condition is satisfied.