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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 761 · 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 < 20) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) go forward (b) turn right
  2. 2.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) push it hard (c) speed up (d) stop or turn away
  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.🤖 A robot is 101 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  5. 5.🤖 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
  6. 6.🤖 What does an “if” let a robot do? (a) choose using a sensor (b) go faster always (c) charge itself (d) skip all sensors
  7. 7.🤖 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
  8. 8.🤖 A robot is 102 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 31 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  10. 10.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 75. What does the robot do?     (a) stop (b) go forward (c) turn left
  11. 11.🤖 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)?
  12. 12.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 36 cm and the light reading is 70. What does the robot do?     (a) go forward (b) turn left (c) stop
  13. 13.🤖 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
  14. 14.🤖 A robot is 69 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  15. 15.🤖 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
  16. 16.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) turn right (b) go forward
  17. 17.🤖 A robot is 93 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  18. 18.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 22 cm and the light reading is 60. What does the robot do?     (a) go forward (b) stop (c) turn left
  19. 19.🤖 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
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 75. What does the robot do?     (a) turn left (b) go forward (c) stop
  21. 21.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 25. What does the robot do?     (a) stop (b) go forward (c) turn left
  22. 22.🤖 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
  23. 23.🤖 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) turn left (b) stop (c) go forward
  24. 24.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 3 cm. What does the robot do?     (a) go forward (b) turn right
  25. 25.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 6 cm. What does the robot do?     (a) turn right (b) go forward
  26. 26.🤖 A robot is 32 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 5 cm and the light reading is 20. What does the robot do?     (a) stop (b) turn left (c) go forward
  28. 28.🤖 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)?
  29. 29.🤖 A robot is 94 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 30 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  31. 31.🤖 A robot is 72 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  32. 32.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) turn right (b) go forward
  33. 33.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 29 cm and the light reading is 25. What does the robot do?     (a) stop (b) turn left (c) go forward
  34. 34.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 19 cm and the light reading is 65. What does the robot do?     (a) stop (b) turn left (c) go forward
  35. 35.🤖 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)?
  36. 36.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 35. What does the robot do?     (a) stop (b) go forward (c) turn left
  37. 37.🤖 A robot is 49 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 25 cm and the light reading is 40. What does the robot do?     (a) turn left (b) stop (c) go forward
  39. 39.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) go forward (b) turn right
  40. 40.🤖 A robot is 41 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?

Answer key

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

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