Run at least once — practice exercise

What you'll be asked to do

1. 1.Run at least onceexercise · easy · 10 min

   Use do...while with a false condition and show how many times the body ran.

   Passes when: #out should show 1.

2. 2.Count to threeexercise · easy · 10 min · practice plan

   Use do...while to collect 1,2,3.

   Passes when: #out should show 1,2,3.

3. 3.Add until over tenexercise · easy · 10 min · practice plan

   Keep adding 4 until the total passes 10, then show the total.

   Passes when: #out should show 12.

4. 4.Double until largeexercise · easy · 10 min · practice plan

   Start at 3 and double until above 20.

   Passes when: #out should show 24.

5. 5.Compare with whileexercise · medium · 10 min · practice plan

   A while loop with a false condition runs zero times — show that count.

   Passes when: #out should show 0.

6. 6.Fix the loop that skips the first passbug fix · easy · 8 min

   A plain while never runs here; do...while should run once.

   Passes when: #out should show 1.

7. 7.Fix the missing increment guardbug fix · easy · 8 min · practice plan

   The condition uses the wrong bound and stops too early.

   Passes when: #out should show 1,2,3.

8. 8.Fix the inverted exit testbug fix · easy · 8 min · practice plan

   The condition is reversed, so the loop stops after one pass.

   Passes when: #out should show 12.

9. 9.Fix the wrong operatorbug fix · easy · 8 min · practice plan

   Adding instead of doubling gives the wrong result.

   Passes when: #out should show 24.

10. 10.Fix the counter placed after the checkbug fix · easy · 8 min · practice plan

    The count is read before the loop updates it.

    Passes when: #out should show 3.

Between them these tasks cover do...while and Guaranteed first pass.

Looking for a different chapter? See every practice set, or switch to the interview theory questions.