Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 725 · 40 questions

Robot tip (True → if, false → else): Put the reading into the condition: true → the if part, false → the else part. < means strictly less; an equal reading makes it false. else if: check the conditions from the top; the first true one wins. while: repeat until the condition is false.

1. 1.🤖 A robot is 104 cm from a wall. It runs:
   while (distance > 20) { forward 10 cm }
   stop
   How far from the wall does it stop (in cm)?
2. 2.🤖 A robot is 56 cm from a wall. It runs:
   while (distance > 20) { forward 10 cm }
   stop
   How far from the wall does it stop (in cm)?
3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
   The distance is 22 cm and the light reading is 65. What does the robot do? (a) stop (b) go forward (c) turn left
4. 4.🤖 if (distance < 30) { turn right } else { go forward }
   The distance sensor reads 33 cm. What does the robot do? (a) go forward (b) turn right
5. 5.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
   The bumper is not pressed. What does the robot do? (a) go forward (b) back up and turn right
6. 6.🤖 if (distance < 10) { turn right } else { go forward }
   The distance sensor reads 9 cm. What does the robot do? (a) go forward (b) turn right
7. 7.🤖 A robot is 95 cm from a wall. It runs:
   while (distance > 20) { forward 10 cm }
   stop
   How far from the wall does it stop (in cm)?
8. 8.🤖 if (distance < 15) { turn right } else { go forward }
   The distance sensor reads 12 cm. What does the robot do? (a) turn right (b) go forward
9. 9.🤖 A robot is 74 cm from a wall. It runs:
   while (distance > 20) { forward 10 cm }
   stop
   How many times does it move forward?
10. 10.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 5 cm. What does the robot do? (a) turn right (b) go forward
11. 11.🤖 A robot is 100 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
12. 12.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 11 cm. What does the robot do? (a) go forward (b) turn right
13. 13.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the else part (b) neither part (c) both parts (d) the if part
14. 14.🤖 What does an “if” let a robot do? (a) charge itself (b) skip all sensors (c) go faster always (d) choose using a sensor
15. 15.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 29 cm. What does the robot do? (a) go forward (b) turn right
16. 16.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do? (a) turn right (b) go forward
17. 17.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 41 cm. What does the robot do? (a) go forward (b) turn right
18. 18.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do? (a) turn right (b) go forward
19. 19.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do? (a) go forward (b) turn right
20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 40. What does the robot do? (a) stop (b) turn left (c) go forward
21. 21.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do? (a) turn right (b) go forward
22. 22.🤖 A robot is 107 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
23. 23.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do? (a) turn right (b) go forward
24. 24.🤖 Obstacle avoiding: what should a robot do when something is close? (a) stop or turn away (b) speed up (c) push it hard (d) close its eyes
25. 25.🤖 A robot is 69 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
26. 26.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do? (a) turn right (b) go forward
27. 27.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
    The bumper is pressed. What does the robot do? (a) back up and turn right (b) go forward
28. 28.🤖 A robot is 39 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
29. 29.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 6 cm. What does the robot do? (a) go forward (b) turn right
30. 30.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do? (a) turn right (b) go forward
31. 31.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is pressed. What does the robot do? (a) back up and turn left (b) go forward
32. 32.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 36 cm. What does the robot do? (a) go forward (b) turn right
33. 33.🤖 A robot is 56 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
34. 34.🤖 A robot is 38 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
35. 35.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 21 cm and the light reading is 45. What does the robot do? (a) turn left (b) go forward (c) stop
36. 36.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 33 cm and the light reading is 30. What does the robot do? (a) turn left (b) go forward (c) stop
37. 37.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do? (a) turn right (b) go forward
38. 38.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 50. What does the robot do? (a) go forward (b) turn left (c) stop
39. 39.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 21 cm and the light reading is 85. What does the robot do? (a) turn left (b) stop (c) go forward
40. 40.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do? (a) turn right (b) go forward

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