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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 638 · 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 66 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.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) turn right (b) go forward
  3. 3.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 8 cm. What does the robot do?     (a) turn right (b) go forward
  4. 4.🤖 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
  5. 5.🤖 What does an “if” let a robot do? (a) charge itself (b) skip all sensors (c) choose using a sensor (d) go faster always
  6. 6.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) go forward (b) turn right
  7. 7.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 40. What does the robot do?     (a) turn left (b) go forward (c) stop
  8. 8.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 25. What does the robot do?     (a) go forward (b) turn left (c) stop
  9. 9.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 75. What does the robot do?     (a) go forward (b) turn left (c) stop
  10. 10.🤖 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
  11. 11.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the if part (b) both parts (c) neither part (d) the else part
  12. 12.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 21 cm and the light reading is 70. What does the robot do?     (a) go forward (b) turn left (c) stop
  13. 13.🤖 A robot is 45 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  14. 14.🤖 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
  15. 15.🤖 A robot is 48 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  16. 16.🤖 A robot is 69 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  17. 17.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 17 cm and the light reading is 45. What does the robot do?     (a) go forward (b) turn left (c) stop
  18. 18.🤖 A robot is 101 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 39 cm and the light reading is 15. What does the robot do?     (a) turn left (b) stop (c) go forward
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 9 cm and the light reading is 50. What does the robot do?     (a) turn left (b) go forward (c) stop
  21. 21.🤖 A robot is 30 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 20. What does the robot do?     (a) turn left (b) go forward (c) stop
  23. 23.🤖 A robot is 72 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  24. 24.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) turn right (b) go forward
  25. 25.🤖 A robot is 63 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  26. 26.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) go forward (b) turn right
  27. 27.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 12 cm. What does the robot do?     (a) turn right (b) go forward
  28. 28.🤖 A robot is 107 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  29. 29.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) go forward (b) turn right
  30. 30.🤖 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
  31. 31.🤖 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
  32. 32.🤖 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)?
  33. 33.🤖 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
  34. 34.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 10. What does the robot do?     (a) turn left (b) stop (c) go forward
  35. 35.🤖 A robot is 107 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  36. 36.🤖 A robot is 75 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  37. 37.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) go forward (b) turn right
  38. 38.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 35 cm. What does the robot do?     (a) turn right (b) go forward
  39. 39.🤖 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
  40. 40.🤖 A robot is 101 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?

Answer key

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

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