AP CSA Unit 2 Day 14: Iteration Selection Filtering

February 6, 2026

Unit 2, Selection & Iteration • Cycle 2

Day 14 Advanced Practice • Harder Difficulty

Focus: Loop Filtering Hard Iteration + Selection (Filtering)

Advanced Practice Question

Format: Iteration + Selection (Filtering)

What is printed?

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

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

Why This Answer?

Only odd i values are added: 1 + 3 + 5 = 9.

Common Mistake

Watch Out!

Accidentally adding evens because of a flipped condition (`== 0` vs `!= 0`).

AP Exam Strategy

When filtering in a loop, identify which values pass the `if` condition.

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

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