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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 419 · 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.🤖 What does an “if” let a robot do? (a) choose using a sensor (b) go faster always (c) charge itself (d) skip all sensors
  2. 2.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 80. What does the robot do?     (a) stop (b) turn left (c) go forward
  3. 3.🤖 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
  4. 4.🤖 A robot is 93 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  5. 5.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 40 cm and the light reading is 60. What does the robot do?     (a) go forward (b) turn left (c) stop
  6. 6.🤖 A robot is 66 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  7. 7.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) stop or turn away (c) speed up (d) push it hard
  8. 8.🤖 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
  9. 9.🤖 A robot is 90 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 19 cm. What does the robot do?     (a) go forward (b) turn right
  11. 11.🤖 A robot is 47 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  12. 12.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 60. What does the robot do?     (a) stop (b) turn left (c) go forward
  13. 13.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 65. What does the robot do?     (a) stop (b) go forward (c) turn left
  14. 14.🤖 A robot is 42 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  15. 15.🤖 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
  16. 16.🤖 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
  17. 17.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 85. What does the robot do?     (a) turn left (b) go forward (c) stop
  18. 18.🤖 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
  19. 19.🤖 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
  20. 20.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 34 cm. What does the robot do?     (a) turn right (b) go forward
  21. 21.🤖 A robot is 33 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  22. 22.🤖 A robot is 94 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  23. 23.🤖 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
  24. 24.🤖 A robot is 56 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  25. 25.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 4 cm. What does the robot do?     (a) turn right (b) go forward
  26. 26.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) neither part (b) the if part (c) both parts (d) the else part
  27. 27.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) go forward (b) turn right
  28. 28.🤖 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
  29. 29.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) turn right (b) go forward
  30. 30.🤖 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)?
  31. 31.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do?     (a) go forward (b) turn right
  32. 32.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 11 cm. What does the robot do?     (a) go forward (b) turn right
  33. 33.🤖 A robot is 66 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.🤖 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)?
  35. 35.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 17 cm and the light reading is 20. What does the robot do?     (a) stop (b) turn left (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) turn right (b) go forward
  37. 37.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 12 cm and the light reading is 55. What does the robot do?     (a) turn left (b) stop (c) go forward
  38. 38.🤖 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) stop (b) go forward (c) turn left
  39. 39.🤖 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)?
  40. 40.🤖 A robot is 43 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?

Answer key

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

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