AP CSA Unit 2 Day 25: Iteration Selection Nested Condition

February 6, 2026

Unit 2, Selection & Iteration • Cycle 2

Day 25 Advanced Practice • Harder Difficulty

Focus: Diagonal Match Hard Iteration + Selection (nested condition)

Advanced Practice Question

Format: Iteration + Selection (nested condition)

What is printed?

for (int i = 1; i <= 10; i++) {
    if (i % 2 == 0) {
        if (i % 3 == 0) {
            System.out.print(i + " ");
        }
    }
}

Difficulty: Hard | Topic: Iteration + Selection (nested condition) | Cycle: 2 (Advanced)

Why This Answer?

Matches occur when (i, j) is (1,1), (2,2), (3,3): 3 matches total.

Common Mistake

Watch Out!

Thinking every pair increments (that would be 9) and missing the `if (i == j)` filter.

AP Exam Strategy

When there is an `if` inside nested loops, count only the iterations that satisfy the condition.

This Cycle 2 HARD question tests diagonal match. Review Unit 2 concepts to build mastery of selection and iteration.

Cycle 2 questions prepare you for the hardest AP CSA exam questions.