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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 30 · 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 51 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  2. 2.🤖 Obstacle avoiding: what should a robot do when something is close? (a) speed up (b) push it hard (c) close its eyes (d) stop or turn away
  3. 3.🤖 What does an “if” let a robot do? (a) charge itself (b) go faster always (c) choose using a sensor (d) skip all sensors
  4. 4.🤖 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
  5. 5.🤖 A robot is 38 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  6. 6.🤖 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
  7. 7.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do?     (a) go forward (b) turn right
  8. 8.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) go forward (b) turn right
  9. 9.🤖 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)?
  10. 10.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) turn right (b) go forward
  11. 11.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 25. What does the robot do?     (a) stop (b) turn left (c) go forward
  12. 12.🤖 A robot is 95 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  13. 13.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) neither part (b) both parts (c) the else part (d) the if part
  14. 14.🤖 A robot is 67 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  15. 15.🤖 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
  16. 16.🤖 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
  17. 17.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) go forward (b) turn right
  18. 18.🤖 A robot is 35 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  19. 19.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 40. What does the robot do?     (a) go forward (b) stop (c) turn left
  20. 20.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) go forward (b) turn right
  21. 21.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 6 cm and the light reading is 45. What does the robot do?     (a) turn left (b) go forward (c) stop
  22. 22.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) turn right (b) go forward
  23. 23.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) turn right (b) go forward
  24. 24.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) go forward (b) turn right
  25. 25.🤖 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
  26. 26.🤖 A robot is 38 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.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 75. What does the robot do?     (a) stop (b) turn left (c) go forward
  28. 28.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 7 cm. What does the robot do?     (a) turn right (b) go forward
  29. 29.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 28 cm. What does the robot do?     (a) turn right (b) go forward
  30. 30.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 15. What does the robot do?     (a) stop (b) turn left (c) go forward
  31. 31.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 34 cm and the light reading is 65. What does the robot do?     (a) go forward (b) stop (c) turn left
  32. 32.🤖 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) stop (b) go forward (c) turn left
  33. 33.🤖 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
  34. 34.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 25. What does the robot do?     (a) turn left (b) go forward (c) stop
  35. 35.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 23 cm and the light reading is 15. What does the robot do?     (a) turn left (b) stop (c) go forward
  36. 36.🤖 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
  37. 37.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 19 cm and the light reading is 85. What does the robot do?     (a) go forward (b) turn left (c) stop
  38. 38.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 45. What does the robot do?     (a) go forward (b) turn left (c) stop
  39. 39.🤖 A robot is 39 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  40. 40.🤖 A robot is 37 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?

Answer key

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

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