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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 745 · 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) skip all sensors (b) charge itself (c) choose using a sensor (d) go faster always
  2. 2.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 27 cm. What does the robot do?     (a) go forward (b) turn right
  3. 3.🤖 A robot is 86 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  4. 4.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 80. What does the robot do?     (a) turn left (b) go forward (c) stop
  5. 5.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) go forward (b) turn right
  6. 6.🤖 Obstacle avoiding: what should a robot do when something is close? (a) push it hard (b) speed up (c) stop or turn away (d) close its eyes
  7. 7.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 15. What does the robot do?     (a) stop (b) turn left (c) go forward
  8. 8.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) both parts (b) the else part (c) the if part (d) neither part
  9. 9.🤖 A robot is 90 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  10. 10.🤖 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
  11. 11.🤖 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
  12. 12.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) turn right (b) go forward
  13. 13.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 33 cm and the light reading is 40. What does the robot do?     (a) go forward (b) stop (c) turn left
  14. 14.🤖 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
  15. 15.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) turn right (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.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 85. What does the robot do?     (a) go forward (b) stop (c) turn left
  18. 18.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 27 cm. What does the robot do?     (a) go forward (b) turn right
  19. 19.🤖 A robot is 32 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  20. 20.🤖 A robot is 62 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  21. 21.🤖 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)?
  22. 22.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) turn right (b) go forward
  23. 23.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 9 cm and the light reading is 80. What does the robot do?     (a) turn left (b) go forward (c) stop
  24. 24.🤖 A robot is 108 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  25. 25.🤖 A robot is 86 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 < 20) { turn right } else { go forward }
    The distance sensor reads 28 cm. What does the robot do?     (a) turn right (b) go forward
  27. 27.🤖 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)?
  28. 28.🤖 A robot is 92 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  29. 29.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) turn right (b) go forward
  30. 30.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 1 cm. What does the robot do?     (a) go forward (b) turn right
  31. 31.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 12 cm and the light reading is 65. What does the robot do?     (a) stop (b) go forward (c) turn left
  32. 32.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 7 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 7 cm and the light reading is 35. What does the robot do?     (a) go forward (b) stop (c) turn left
  34. 34.🤖 A robot is 103 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  35. 35.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do?     (a) go forward (b) turn right
  36. 36.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) turn right (b) go forward
  37. 37.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 65. What does the robot do?     (a) go forward (b) stop (c) turn left
  38. 38.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 28 cm. What does the robot do?     (a) go forward (b) turn right
  39. 39.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 55. What does the robot do?     (a) turn left (b) go forward (c) stop
  40. 40.🤖 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)?

Answer key

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

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