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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 281 · 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 82 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  2. 2.🤖 What does an “if” let a robot do? (a) skip all sensors (b) go faster always (c) choose using a sensor (d) charge itself
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 38 cm and the light reading is 25. What does the robot do?     (a) stop (b) go forward (c) turn left
  4. 4.🤖 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
  5. 5.🤖 A robot is 48 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  6. 6.🤖 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
  7. 7.🤖 Obstacle avoiding: what should a robot do when something is close? (a) stop or turn away (b) push it hard (c) speed up (d) close its eyes
  8. 8.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 17 cm and the light reading is 30. What does the robot do?     (a) go forward (b) stop (c) turn left
  9. 9.🤖 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
  10. 10.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) go forward (b) turn right
  11. 11.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the else part (b) neither part (c) both parts (d) the if part
  12. 12.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) turn right (b) go forward
  13. 13.🤖 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
  14. 14.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 37 cm and the light reading is 90. What does the robot do?     (a) stop (b) go forward (c) turn left
  15. 15.🤖 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
  16. 16.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 30. What does the robot do?     (a) go forward (b) stop (c) turn left
  17. 17.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 40 cm and the light reading is 85. What does the robot do?     (a) stop (b) turn left (c) go forward
  18. 18.🤖 A robot is 39 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 64 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.🤖 A robot is 61 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  21. 21.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 9 cm. What does the robot do?     (a) turn right (b) go forward
  22. 22.🤖 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
  23. 23.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) turn right (b) go forward
  24. 24.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 50. What does the robot do?     (a) go forward (b) turn left (c) stop
  25. 25.🤖 A robot is 41 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  26. 26.🤖 A robot is 84 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  27. 27.🤖 A robot is 65 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  28. 28.🤖 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) go forward (b) stop (c) turn left
  29. 29.🤖 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)?
  30. 30.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 19 cm and the light reading is 10. What does the robot do?     (a) go forward (b) turn left (c) stop
  31. 31.🤖 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
  32. 32.🤖 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)?
  33. 33.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 45. What does the robot do?     (a) go forward (b) turn left (c) stop
  34. 34.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) go forward (b) turn right
  35. 35.🤖 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
  36. 36.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) turn right (b) go forward
  37. 37.🤖 A robot is 53 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  38. 38.🤖 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)?
  39. 39.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) turn right (b) go forward
  40. 40.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 29 cm. What does the robot do?     (a) turn right (b) go forward

Answer key

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

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