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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 68 · 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 (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
  2. 2.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 6 cm and the light reading is 50. What does the robot do?     (a) stop (b) turn left (c) go forward
  3. 3.🤖 A robot is 102 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  4. 4.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the else part (b) the if part (c) neither part (d) both parts
  5. 5.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) go forward (b) turn right
  6. 6.🤖 A robot is 72 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  7. 7.🤖 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
  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) go forward (b) back up and turn right
  9. 9.🤖 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)?
  10. 10.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) go forward (b) 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 10. What does the robot do?     (a) go forward (b) turn left (c) stop
  12. 12.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) go forward (b) turn right
  13. 13.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 22 cm and the light reading is 50. 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 9 cm and the light reading is 85. What does the robot do?     (a) turn left (b) go forward (c) stop
  15. 15.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 70. What does the robot do?     (a) turn left (b) stop (c) go forward
  16. 16.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) go forward (b) turn right
  17. 17.🤖 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
  18. 18.🤖 What does an “if” let a robot do? (a) charge itself (b) choose using a sensor (c) go faster always (d) skip all sensors
  19. 19.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) turn right (b) go forward
  20. 20.🤖 A robot is 39 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  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 < 25) { turn right } else { go forward }
    The distance sensor reads 27 cm. What does the robot do?     (a) turn right (b) go forward
  23. 23.🤖 A robot is 106 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  24. 24.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) go forward (b) turn right
  25. 25.🤖 A robot is 37 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move 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 40. What does the robot do?     (a) turn left (b) go forward (c) stop
  27. 27.🤖 A robot is 62 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  28. 28.🤖 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
  29. 29.🤖 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
  30. 30.🤖 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
  31. 31.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) turn right (b) go forward
  32. 32.🤖 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
  33. 33.🤖 A robot is 36 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  34. 34.🤖 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
  35. 35.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 26 cm and the light reading is 30. What does the robot do?     (a) go forward (b) stop (c) turn left
  36. 36.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 26 cm and the light reading is 75. What does the robot do?     (a) go forward (b) turn left (c) stop
  37. 37.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 23 cm and the light reading is 65. What does the robot do?     (a) turn left (b) stop (c) go forward
  38. 38.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 36 cm. What does the robot do?     (a) turn right (b) go forward
  39. 39.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) go forward (b) turn right
  40. 40.🤖 A robot is 33 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?

Answer key

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

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