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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 795 · 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 100 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  2. 2.🤖 A robot is 80 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  3. 3.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) speed up (c) push it hard (d) stop or turn away
  4. 4.🤖 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
  5. 5.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 42 cm. What does the robot do?     (a) go forward (b) turn right
  6. 6.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) go forward (b) turn right
  7. 7.🤖 A robot is 80 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  8. 8.🤖 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
  9. 9.🤖 A robot is 93 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  10. 10.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 41 cm. What does the robot do?     (a) turn right (b) go forward
  11. 11.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) turn right (b) go forward
  12. 12.🤖 What does an “if” let a robot do? (a) charge itself (b) choose using a sensor (c) skip all sensors (d) go faster always
  13. 13.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 37 cm and the light reading is 70. What does the robot do?     (a) turn left (b) stop (c) go forward
  14. 14.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 50. What does the robot do?     (a) stop (b) turn left (c) go forward
  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.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the if part (b) neither part (c) both parts (d) the else part
  17. 17.🤖 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
  18. 18.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 2 cm. What does the robot do?     (a) turn right (b) go forward
  19. 19.🤖 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
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 60. What does the robot do?     (a) turn left (b) go forward (c) stop
  21. 21.🤖 A robot is 97 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  22. 22.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 9 cm. What does the robot do?     (a) turn right (b) go forward
  23. 23.🤖 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
  24. 24.🤖 A robot is 34 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 40 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 32 cm and the light reading is 60. What does the robot do?     (a) turn left (b) go forward (c) stop
  27. 27.🤖 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)?
  28. 28.🤖 A robot is 41 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  29. 29.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 35. What does the robot do?     (a) turn left (b) go forward (c) stop
  30. 30.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 20 cm and the light reading is 70. What does the robot do?     (a) go forward (b) stop (c) turn left
  31. 31.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 38 cm. What does the robot do?     (a) go forward (b) turn right
  32. 32.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 28 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 24 cm and the light reading is 55. What does the robot do?     (a) turn left (b) stop (c) go forward
  34. 34.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) turn right (b) go forward
  35. 35.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) go forward (b) turn right
  36. 36.🤖 A robot is 90 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) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 37 cm and the light reading is 35. What does the robot do?     (a) go forward (b) stop (c) turn left
  38. 38.🤖 A robot is 69 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  39. 39.🤖 A robot is 92 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  40. 40.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 32 cm and the light reading is 10. What does the robot do?     (a) go forward (b) stop (c) turn left

Answer key

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

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