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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 507 · 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.🤖 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) turn left (b) go forward (c) stop
  2. 2.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 10 cm. What does the robot do?     (a) turn right (b) go forward
  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 60. What does the robot do?     (a) stop (b) turn left (c) go forward
  4. 4.🤖 What does an “if” let a robot do? (a) go faster always (b) choose using a sensor (c) skip all sensors (d) charge itself
  5. 5.🤖 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
  6. 6.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the if part (b) both parts (c) the else part (d) neither part
  7. 7.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 3 cm. What does the robot do?     (a) turn right (b) go forward
  8. 8.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) go forward (b) turn right
  9. 9.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 35. What does the robot do?     (a) go forward (b) turn left (c) stop
  10. 10.🤖 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
  11. 11.🤖 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
  12. 12.🤖 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
  13. 13.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 75. What does the robot do?     (a) go forward (b) stop (c) turn left
  14. 14.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 22 cm and the light reading is 35. What does the robot do?     (a) go forward (b) stop (c) turn left
  15. 15.🤖 A robot is 57 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 51 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  17. 17.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) push it hard (c) stop or turn away (d) speed up
  18. 18.🤖 A robot is 60 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  19. 19.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) go forward (b) turn right
  20. 20.🤖 A robot is 81 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  21. 21.🤖 A robot is 31 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.🤖 A robot is 82 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  23. 23.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) turn right (b) go forward
  24. 24.🤖 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
  25. 25.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 18 cm. What does the robot do?     (a) turn right (b) go forward
  26. 26.🤖 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) stop (b) go forward (c) turn left
  27. 27.🤖 A robot is 59 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 39 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  29. 29.🤖 A robot is 88 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.🤖 A robot is 54 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  31. 31.🤖 A robot is 93 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  32. 32.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 24 cm and the light reading is 75. What does the robot do?     (a) turn left (b) stop (c) go forward
  33. 33.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) go forward (b) turn right
  34. 34.🤖 A robot is 90 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  35. 35.🤖 A robot is 83 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  36. 36.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) go forward (b) turn right
  37. 37.🤖 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)?
  38. 38.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 8 cm and the light reading is 40. What does the robot do?     (a) stop (b) turn left (c) go forward
  39. 39.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 34 cm. What does the robot do?     (a) go forward (b) turn right
  40. 40.🤖 A robot is 49 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?

Answer key

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

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