Computer Science for IGCSE & O level - Algorithm Design And Problem Solving (Section 9 - No. 29)
When should you employ a `WHILE...DO...ENDWHILE` loop?
When the code should always run once.
When you have a known number of iterations.
When the repetition depends on a specific condition.
When you need to choose one of many options.
Explication
Use WHILE when the number of iterations is unknown but the action should be repeated until a certain condition is met.