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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 988 · 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 left } else { go forward }
    The bumper is pressed. What does the robot do?     (a) go forward (b) back up and turn left
  2. 2.🤖 A robot is 57 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  3. 3.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the if part (b) both parts (c) neither part (d) the else part
  4. 4.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 20. What does the robot do?     (a) stop (b) go forward (c) turn left
  5. 5.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) turn right (b) go forward
  6. 6.🤖 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
  7. 7.🤖 A robot is 44 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  8. 8.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 29 cm. What does the robot do?     (a) go forward (b) turn right
  9. 9.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) go forward (b) turn right
  10. 10.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 40 cm and the light reading is 25. What does the robot do?     (a) go forward (b) turn left (c) stop
  11. 11.🤖 A robot is 79 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  12. 12.🤖 A robot is 74 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  13. 13.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) speed up (c) push it hard (d) stop or turn away
  14. 14.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) turn right (b) go forward
  15. 15.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) go forward (b) turn right
  16. 16.🤖 A robot is 60 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  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.🤖 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
  19. 19.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 60. What does the robot do?     (a) turn left (b) go forward (c) stop
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 32 cm and the light reading is 80. What does the robot do?     (a) go forward (b) stop (c) turn left
  21. 21.🤖 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)?
  22. 22.🤖 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)?
  23. 23.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 27 cm. What does the robot do?     (a) go forward (b) turn right
  24. 24.🤖 What does an “if” let a robot do? (a) charge itself (b) skip all sensors (c) choose using a sensor (d) go faster always
  25. 25.🤖 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)?
  26. 26.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 30. What does the robot do?     (a) stop (b) turn left (c) go forward
  27. 27.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 50. What does the robot do?     (a) go forward (b) stop (c) turn left
  28. 28.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) turn right (b) go forward
  29. 29.🤖 A robot is 61 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  30. 30.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 65. What does the robot do?     (a) turn left (b) stop (c) go forward
  31. 31.🤖 A robot is 72 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  32. 32.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 40 cm and the light reading is 80. What does the robot do?     (a) stop (b) turn left (c) go forward
  33. 33.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 33 cm. What does the robot do?     (a) go forward (b) turn right
  34. 34.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 29 cm and the light reading is 15. What does the robot do?     (a) go forward (b) stop (c) turn left
  35. 35.🤖 A robot is 45 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  36. 36.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 5 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 33 cm and the light reading is 25. What does the robot do?     (a) go forward (b) turn left (c) stop
  38. 38.🤖 A robot is 30 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 32 cm and the light reading is 15. What does the robot do?     (a) go forward (b) turn left (c) stop
  40. 40.🤖 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

Answer key

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

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