TalentJR apps
A bug is a mistake in a program; debugging is finding and fixing it. First run the program and watch what goes wrong. Then compare: where should the robot be, and where did it go? A robot that ends up on the wrong side has a left/right mix-up; one that stops short has a wrong number. A square that does not close has the wrong turn angle — it must be 360 ÷ 4 = 90°. Fix one thing at a time and test again, so you know what worked.
✓ You passed this lesson’s test.
Compare and fix one thing — “run the program in your head, compare with what should happen, fix one thing, test again”
Use it for: Every time a robot or a program does something unexpected, coding lessons and robotics competitions.
Check: 4 × 90° = 360° — now the square closes ✓
▶ Watch it animatedWork it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.
Right: 0 · Tried: 0
20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.
🏅 Sign in with Google to earn the 🐞 Robot Debugger badge when you pass — and a certificate when you finish all 10 lessons of Part 3 · Programming robots. You can still take the test without signing in.
Why does it work? When should you use it? Ask in English, मराठी or हिंदी.
Sign in with Google to ask Free — 20 questions a day.
Prefer a real teacher? TalentJR teachers take live online classes anywhere in India and visit homes in selected cities. Tell us what you need and our team will call you with timings and fees.