Unit 2 Cycle 2 Day 20: Iteration (accumulation)
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Unit 2, Selection & Iteration • Cycle 2
Day 20 Advanced Practice • Harder Difficulty
Focus: Zero-Based Accumulation
Hard
Iteration (accumulation)
Advanced Practice Question
Format: Iteration (accumulation)
What is printed?
What is printed?
"apcs-keyword">int s = "apcs-number">0;
"apcs-keyword">for ("apcs-keyword">int i = "apcs-number">0; i <= "apcs-number">4; i++)
{
s += i;
}
System.out.println(s);
Difficulty: Hard |
Topic: Iteration (accumulation) |
Cycle: 2 (Advanced)
Why This Answer?
The loop adds 0 + 1 + 2 + 3 + 4 = 10.
Common Mistake
Watch Out!
Forgetting that starting at 0 still includes 4 because of `<= 4`.
AP Exam Strategy
Check both the start value and whether the end is inclusive.
Master This Topic
This Cycle 2 HARD question tests zero-based accumulation. Review Unit 2 concepts to build mastery of selection and iteration.
- Understanding zero-based accumulation
- Tracing code execution accurately
- Avoiding common pitfalls
Ready for More Challenges?
Cycle 2 questions prepare you for the hardest AP CSA exam questions.
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