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Definition
Condition-controlled loop that tests its expression at the end of the block.
Advantages
Guarantees the code inside the loop will execute at least once before checking the condition
Disadvantages
If written incorrectly, it can accidentally process bad input once before realizing it shouldn't have.
Key Phrase
Repeat checks at the exit door
Exam Question
Analyze the given pseudocode segment. Identify why the programmer selected a REPEAT...UNTIL loop structure instead of a WHILE loop for a user password validation entry.