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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 640 · 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 37 cm and the light reading is 45. What does the robot do?     (a) stop (b) go forward (c) turn left
  2. 2.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) both parts (b) the if part (c) neither part (d) the else part
  3. 3.🤖 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
  4. 4.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 36 cm and the light reading is 90. What does the robot do?     (a) turn left (b) stop (c) go forward
  5. 5.🤖 What does an “if” let a robot do? (a) go faster always (b) charge itself (c) choose using a sensor (d) skip all sensors
  6. 6.🤖 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) turn left (b) stop (c) go forward
  7. 7.🤖 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)?
  8. 8.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) go forward (b) turn right
  9. 9.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 3 cm. What does the robot do?     (a) go forward (b) turn right
  10. 10.🤖 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)?
  11. 11.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 11 cm. What does the robot do?     (a) turn right (b) go forward
  12. 12.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) go forward (b) turn right
  13. 13.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 21 cm and the light reading is 55. What does the robot do?     (a) stop (b) turn left (c) go forward
  14. 14.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 50. What does the robot do?     (a) stop (b) go forward (c) turn left
  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) go forward (b) back up and turn left
  17. 17.🤖 A robot is 104 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  18. 18.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 17 cm and the light reading is 35. What does the robot do?     (a) go forward (b) stop (c) turn left
  19. 19.🤖 A robot is 33 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  20. 20.🤖 Obstacle avoiding: what should a robot do when something is close? (a) push it hard (b) stop or turn away (c) close its eyes (d) speed up
  21. 21.🤖 A robot is 78 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  22. 22.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 90. 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 27 cm. What does the robot do?     (a) go forward (b) turn right
  24. 24.🤖 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
  25. 25.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 11 cm. What does the robot do?     (a) turn right (b) go forward
  26. 26.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 90. What does the robot do?     (a) stop (b) go forward (c) turn left
  27. 27.🤖 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
  28. 28.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) go forward (b) turn right
  29. 29.🤖 A robot is 44 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  30. 30.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 25 cm and the light reading is 55. What does the robot do?     (a) go forward (b) turn left (c) stop
  31. 31.🤖 A robot is 47 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  32. 32.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) go forward (b) turn right
  33. 33.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 40. What does the robot do?     (a) turn left (b) stop (c) go forward
  34. 34.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 30. What does the robot do?     (a) go forward (b) turn left (c) stop
  35. 35.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 34 cm and the light reading is 20. What does the robot do?     (a) turn left (b) go forward (c) stop
  36. 36.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 12 cm. What does the robot do?     (a) go forward (b) turn right
  37. 37.🤖 A robot is 40 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.🤖 A robot is 79 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 < 10) { turn right } else { go forward }
    The distance sensor reads 5 cm. What does the robot do?     (a) go forward (b) turn right
  40. 40.🤖 A robot is 77 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?

Answer key

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

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