Difficulty: Medium
Correct Answer: No output is produced.
Explanation:
Introduction / Context:
This classic formatting puzzle tests how Java parses a do-while statement whose body is itself a while statement. The key is understanding statement boundaries and which loop actually executes.
Given Data / Assumptions:
I is initialized to 1.do statement's body is a single while statement: while (I < 1) System.out.print(...);while (I > 1); is the terminator of the do loop.
Concept / Approach:
Evaluate the inner while (I < 1) first: since I == 1, it executes zero times and prints nothing. Then the outer do-while checks its condition (I > 1), which is false, so the entire construct ends with no output.
Step-by-Step Solution:
Inner while condition: I < 1 ⇒ false at entry ⇒ body never runs.The do executes its single statement (the inner while) exactly once (doing nothing).Outer terminating condition: I > 1 ⇒ false; loop finishes.No print statements were executed ⇒ no output.
Verification / Alternative check:
Change I to 0 and you will see "I is 0" printed repeatedly until the outer condition stops it (it still won’t in this exact shape without changing I).
Why Other Options Are Wrong:
They assume the print executes at least once or a compilation problem; the code is valid and the inner condition is false.
Common Pitfalls:
Misreading line breaks as scoping braces; Java does not add implicit blocks based on newlines or indentation.
Final Answer:
No output is produced.
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