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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 409 · 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 34 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  2. 2.🤖 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
  3. 3.🤖 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
  4. 4.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) turn right (b) go forward
  5. 5.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 32 cm and the light reading is 15. What does the robot do?     (a) turn left (b) stop (c) go forward
  6. 6.🤖 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) go forward (c) stop
  7. 7.🤖 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
  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 87 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 left } else { go forward }
    The bumper is pressed. What does the robot do?     (a) back up and turn left (b) go forward
  11. 11.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) go forward (b) turn right
  12. 12.🤖 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
  13. 13.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 27 cm. What does the robot do?     (a) turn right (b) go forward
  14. 14.🤖 A robot is 36 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  15. 15.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 38 cm and the light reading is 30. What does the robot do?     (a) turn left (b) go forward (c) stop
  16. 16.🤖 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
  17. 17.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 25. What does the robot do?     (a) turn left (b) stop (c) go forward
  18. 18.🤖 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)?
  19. 19.🤖 A robot is 99 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  20. 20.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) turn right (b) go forward
  21. 21.🤖 A robot is 45 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.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 24 cm and the light reading is 45. What does the robot do?     (a) stop (b) go forward (c) turn left
  23. 23.🤖 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) stop (b) go forward (c) turn left
  24. 24.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 90. What does the robot do?     (a) turn left (b) stop (c) go forward
  25. 25.🤖 A robot is 104 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.🤖 A robot is 50 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  27. 27.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 35 cm. What does the robot do?     (a) turn right (b) go forward
  28. 28.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do?     (a) turn right (b) go forward
  29. 29.🤖 What does an “if” let a robot do? (a) charge itself (b) skip all sensors (c) choose using a sensor (d) go faster always
  30. 30.🤖 A robot is 45 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 73 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  32. 32.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) go forward (b) turn right
  33. 33.🤖 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)?
  34. 34.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 21 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 12 cm and the light reading is 40. What does the robot do?     (a) turn left (b) go forward (c) stop
  36. 36.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 12 cm and the light reading is 60. What does the robot do?     (a) turn left (b) go forward (c) stop
  37. 37.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) go forward (b) turn right
  38. 38.🤖 A robot is 66 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 88 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  40. 40.🤖 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

Answer key

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

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