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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 266 · 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.🤖 A robot is 52 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  2. 2.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) both parts (b) the if part (c) the else part (d) neither part
  3. 3.🤖 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
  4. 4.🤖 Obstacle avoiding: what should a robot do when something is close? (a) speed up (b) stop or turn away (c) push it hard (d) close its eyes
  5. 5.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 12 cm and the light reading is 25. What does the robot do?     (a) turn left (b) go forward (c) stop
  6. 6.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) go forward (b) turn right
  7. 7.🤖 A robot is 88 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  8. 8.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 90. What does the robot do?     (a) turn left (b) stop (c) go forward
  9. 9.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is not pressed. What does the robot do?     (a) go forward (b) back up and turn left
  10. 10.🤖 A robot is 70 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) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 15. What does the robot do?     (a) go forward (b) stop (c) turn left
  12. 12.🤖 What does an “if” let a robot do? (a) skip all sensors (b) charge itself (c) go faster always (d) choose using a sensor
  13. 13.🤖 A robot is 58 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 100 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  15. 15.🤖 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
  16. 16.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) turn right (b) go forward
  17. 17.🤖 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
  18. 18.🤖 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
  19. 19.🤖 A robot is 48 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.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 35. What does the robot do?     (a) go forward (b) stop (c) turn left
  21. 21.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 85. What does the robot do?     (a) turn left (b) go forward (c) stop
  22. 22.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 14 cm and the light reading is 50. What does the robot do?     (a) stop (b) turn left (c) go forward
  23. 23.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) turn right (b) go forward
  24. 24.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do?     (a) turn right (b) go forward
  25. 25.🤖 A robot is 46 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  26. 26.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 15. What does the robot do?     (a) go forward (b) turn left (c) stop
  27. 27.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 7 cm and the light reading is 25. What does the robot do?     (a) go forward (b) turn left (c) stop
  28. 28.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) go forward (b) turn right
  29. 29.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 55. What does the robot do?     (a) turn left (b) go forward (c) stop
  30. 30.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 39 cm. What does the robot do?     (a) go forward (b) turn right
  31. 31.🤖 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)?
  32. 32.🤖 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
  33. 33.🤖 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
  34. 34.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 7 cm and the light reading is 90. What does the robot do?     (a) turn left (b) go forward (c) stop
  35. 35.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) turn right (b) go forward
  36. 36.🤖 A robot is 95 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  37. 37.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 4 cm. What does the robot do?     (a) turn right (b) go forward
  38. 38.🤖 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
  39. 39.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) go forward (b) turn right
  40. 40.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 14 cm and the light reading is 60. What does the robot do?     (a) turn left (b) stop (c) go forward

Answer key

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

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