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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 273 · 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 12 cm and the light reading is 80. What does the robot do?     (a) stop (b) go forward (c) turn left
  2. 2.🤖 A robot is 79 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 35 cm and the light reading is 30. What does the robot do?     (a) go forward (b) turn left (c) stop
  4. 4.🤖 Obstacle avoiding: what should a robot do when something is close? (a) stop or turn away (b) speed up (c) close its eyes (d) push it hard
  5. 5.🤖 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
  6. 6.🤖 What does an “if” let a robot do? (a) skip all sensors (b) choose using a sensor (c) charge itself (d) go faster always
  7. 7.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 90. What does the robot do?     (a) go forward (b) stop (c) turn left
  8. 8.🤖 A robot is 38 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  9. 9.🤖 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)?
  10. 10.🤖 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
  11. 11.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 90. What does the robot do?     (a) turn left (b) stop (c) go forward
  12. 12.🤖 A robot is 63 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.🤖 A robot is 49 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) back up and turn left (b) go forward
  15. 15.🤖 A robot is 70 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  16. 16.🤖 A robot is 43 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  17. 17.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) turn right (b) go forward
  18. 18.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 37 cm. What does the robot do?     (a) go forward (b) turn right
  19. 19.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 34 cm and the light reading is 40. What does the robot do?     (a) turn left (b) stop (c) go forward
  20. 20.🤖 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
  21. 21.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 50. What does the robot do?     (a) stop (b) turn left (c) go forward
  22. 22.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) neither part (b) both parts (c) the if part (d) the else part
  23. 23.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 38 cm and the light reading is 50. What does the robot do?     (a) turn left (b) go forward (c) stop
  24. 24.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 85. What does the robot do?     (a) stop (b) go forward (c) turn left
  25. 25.🤖 A robot is 81 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 13 cm. What does the robot do?     (a) go forward (b) turn right
  27. 27.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) go forward (b) turn right
  28. 28.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 23 cm and the light reading is 40. What does the robot do?     (a) turn left (b) stop (c) go forward
  29. 29.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 24 cm and the light reading is 10. What does the robot do?     (a) turn left (b) go forward (c) stop
  30. 30.🤖 A robot is 82 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  31. 31.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 55. What does the robot do?     (a) stop (b) go forward (c) turn left
  32. 32.🤖 A robot is 40 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  33. 33.🤖 A robot is 41 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  34. 34.🤖 A robot is 87 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 (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
  36. 36.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 25 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 29 cm and the light reading is 75. What does the robot do?     (a) go forward (b) turn left (c) stop
  38. 38.🤖 A robot is 47 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  39. 39.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 23 cm and the light reading is 30. What does the robot do?     (a) turn left (b) stop (c) go forward
  40. 40.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) turn right (b) go forward

Answer key

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

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