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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 539 · 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.🤖 What does an “if” let a robot do? (a) charge itself (b) go faster always (c) skip all sensors (d) choose using a sensor
  2. 2.🤖 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
  3. 3.🤖 A robot is 81 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  4. 4.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 27 cm. What does the robot do?     (a) turn right (b) go forward
  5. 5.🤖 A robot is 51 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  6. 6.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 22 cm and the light reading is 80. What does the robot do?     (a) stop (b) turn left (c) go forward
  7. 7.🤖 A robot is 63 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  8. 8.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) turn right (b) go forward
  9. 9.🤖 A robot is 89 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  10. 10.🤖 A robot is 49 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  11. 11.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 65. What does the robot do?     (a) go forward (b) stop (c) turn left
  12. 12.🤖 A robot is 52 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  13. 13.🤖 A robot is 65 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  14. 14.🤖 A robot is 31 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 pressed. What does the robot do?     (a) go forward (b) back up and turn left
  16. 16.🤖 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)?
  17. 17.🤖 A robot is 100 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  18. 18.🤖 A robot is 54 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.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 17 cm and the light reading is 40. What does the robot do?     (a) stop (b) turn left (c) go forward
  20. 20.🤖 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
  21. 21.🤖 A robot is 109 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  22. 22.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 15. What does the robot do?     (a) go forward (b) stop (c) turn left
  23. 23.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 18 cm. What does the robot do?     (a) go forward (b) turn right
  24. 24.🤖 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
  25. 25.🤖 A robot is 50 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 28 cm and the light reading is 55. What does the robot do?     (a) turn left (b) go forward (c) stop
  27. 27.🤖 A robot is 69 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.🤖 A robot is 65 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 (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
  30. 30.🤖 A robot is 93 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  31. 31.🤖 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
  32. 32.🤖 A robot is 43 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.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 33 cm. What does the robot do?     (a) turn right (b) go forward
  34. 34.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 19 cm and the light reading is 55. What does the robot do?     (a) turn left (b) stop (c) go forward
  35. 35.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 15. 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 32 cm and the light reading is 35. What does the robot do?     (a) stop (b) turn left (c) go forward
  37. 37.🤖 A robot is 61 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  38. 38.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 26 cm and the light reading is 50. What does the robot do?     (a) stop (b) go forward (c) turn left
  39. 39.🤖 A robot is 50 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  40. 40.🤖 A robot is 38 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?

Answer key

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

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