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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 893 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 21 cm and the light reading is 15. What does the robot do?     (a) turn left (b) stop (c) go forward
  2. 2.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is not pressed. What does the robot do?     (a) back up and turn left (b) go forward
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 20. What does the robot do?     (a) turn left (b) stop (c) go forward
  4. 4.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) go forward (b) turn right
  5. 5.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 7 cm. What does the robot do?     (a) go forward (b) turn right
  6. 6.🤖 A robot is 37 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  7. 7.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 37 cm and the light reading is 50. What does the robot do?     (a) stop (b) turn left (c) go forward
  8. 8.🤖 What does an “if” let a robot do? (a) charge itself (b) skip all sensors (c) go faster always (d) choose using a sensor
  9. 9.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 29 cm and the light reading is 85. What does the robot do?     (a) stop (b) turn left (c) go forward
  10. 10.🤖 A robot is 35 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  11. 11.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 39 cm. What does the robot do?     (a) turn right (b) go forward
  12. 12.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 5 cm. What does the robot do?     (a) go forward (b) turn right
  13. 13.🤖 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
  14. 14.🤖 A robot is 44 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  15. 15.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 12 cm and the light reading is 65. What does the robot do?     (a) turn left (b) go forward (c) stop
  16. 16.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) both parts (b) the else part (c) neither part (d) the if part
  17. 17.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
    The bumper is pressed. What does the robot do?     (a) go forward (b) back up and turn right
  18. 18.🤖 A robot is 60 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  19. 19.🤖 A robot is 66 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  20. 20.🤖 A robot is 62 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  21. 21.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 33 cm. What does the robot do?     (a) turn right (b) go forward
  22. 22.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) push it hard (c) speed up (d) stop or turn away
  23. 23.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 7 cm and the light reading is 30. What does the robot do?     (a) turn left (b) stop (c) go forward
  24. 24.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 1 cm. What does the robot do?     (a) go forward (b) turn right
  25. 25.🤖 A robot is 34 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) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 20 cm and the light reading is 70. What does the robot do?     (a) turn left (b) stop (c) go forward
  27. 27.🤖 A robot is 103 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  28. 28.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 75. What does the robot do?     (a) stop (b) turn left (c) go forward
  29. 29.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) go forward (b) turn right
  30. 30.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) go forward (b) turn right
  31. 31.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 19 cm and the light reading is 45. What does the robot do?     (a) turn left (b) go forward (c) stop
  32. 32.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 60. What does the robot do?     (a) turn left (b) stop (c) go forward
  33. 33.🤖 A robot is 42 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  34. 34.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is pressed. What does the robot do?     (a) go forward (b) back up and turn left
  35. 35.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 23 cm and the light reading is 55. What does the robot do?     (a) go forward (b) stop (c) turn left
  36. 36.🤖 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
  37. 37.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 29 cm and the light reading is 65. What does the robot do?     (a) turn left (b) go forward (c) stop
  38. 38.🤖 A robot is 35 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  39. 39.🤖 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
  40. 40.🤖 A robot is 62 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?

Answer key

  1. turn left
  2. go forward
  3. turn left
  4. go forward
  5. turn right
  6. 17
  7. go forward
  8. choose using a sensor
  9. go forward
  10. 2
  11. go forward
  12. turn right
  13. go forward
  14. 3
  15. stop
  16. the else part
  17. back up and turn right
  18. 20
  19. 5
  20. 12
  21. go forward
  22. stop or turn away
  23. stop
  24. turn right
  25. 2
  26. go forward
  27. 13
  28. stop
  29. turn right
  30. go forward
  31. go forward
  32. go forward
  33. 12
  34. back up and turn left
  35. go forward
  36. go forward
  37. go forward
  38. 15
  39. go forward
  40. 5

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