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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 105 · 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.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) both parts (b) neither part (c) the else part (d) the if part
  2. 2.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) turn right (b) go forward
  3. 3.🤖 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
  4. 4.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) push it hard (c) stop or turn away (d) speed up
  5. 5.🤖 A robot is 87 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  6. 6.🤖 A robot is 67 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.🤖 A robot is 41 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.🤖 What does an “if” let a robot do? (a) go faster always (b) skip all sensors (c) charge itself (d) choose using a sensor
  9. 9.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 27 cm. What does the robot do?     (a) turn right (b) go forward
  10. 10.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 7 cm and the light reading is 10. What does the robot do?     (a) go forward (b) turn left (c) stop
  11. 11.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) go forward (b) turn right
  12. 12.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 7 cm and the light reading is 70. What does the robot do?     (a) go forward (b) turn left (c) stop
  13. 13.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) turn right (b) go forward
  14. 14.🤖 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)?
  15. 15.🤖 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
  16. 16.🤖 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
  17. 17.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 10 cm. What does the robot do?     (a) turn right (b) go forward
  18. 18.🤖 A robot is 79 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  19. 19.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 18 cm. What does the robot do?     (a) go forward (b) turn right
  20. 20.🤖 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
  21. 21.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
    The bumper is not pressed. What does the robot do?     (a) back up and turn right (b) go forward
  22. 22.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 19 cm and the light reading is 15. What does the robot do?     (a) stop (b) turn left (c) go forward
  23. 23.🤖 A robot is 82 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  24. 24.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) go forward (b) turn right
  25. 25.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 12 cm. What does the robot do?     (a) go forward (b) turn right
  26. 26.🤖 A robot is 93 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  27. 27.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 27 cm. What does the robot do?     (a) go forward (b) turn right
  28. 28.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 33 cm and the light reading is 70. What does the robot do?     (a) go forward (b) turn left (c) stop
  29. 29.🤖 A robot is 89 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  30. 30.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do?     (a) turn right (b) go forward
  31. 31.🤖 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
  32. 32.🤖 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)?
  33. 33.🤖 A robot is 88 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 (distance < 10) { turn right } else { go forward }
    The distance sensor reads 5 cm. What does the robot do?     (a) turn right (b) go forward
  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 80. What does the robot do?     (a) stop (b) turn left (c) go forward
  36. 36.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 6 cm and the light reading is 15. What does the robot do?     (a) turn left (b) stop (c) go forward
  37. 37.🤖 A robot is 39 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  38. 38.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 10 cm. What does the robot do?     (a) turn right (b) go forward
  39. 39.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 8 cm and the light reading is 50. What does the robot do?     (a) go forward (b) turn left (c) stop
  40. 40.🤖 A robot is 94 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?

Answer key

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

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