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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 879 · 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 < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 23 cm and the light reading is 40. What does the robot do?     (a) turn left (b) go forward (c) stop
  2. 2.🤖 What does an “if” let a robot do? (a) skip all sensors (b) go faster always (c) choose using a sensor (d) charge itself
  3. 3.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) neither part (b) the else part (c) the if part (d) both parts
  4. 4.🤖 Obstacle avoiding: what should a robot do when something is close? (a) stop or turn away (b) close its eyes (c) speed up (d) push it hard
  5. 5.🤖 A robot is 92 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  6. 6.🤖 A robot is 30 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  7. 7.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) go forward (b) turn right
  8. 8.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 35 cm and the light reading is 30. What does the robot do?     (a) go forward (b) stop (c) turn left
  9. 9.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 2 cm. What does the robot do?     (a) turn right (b) go forward
  10. 10.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 7 cm and the light reading is 60. What does the robot do?     (a) stop (b) go forward (c) turn left
  11. 11.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 18 cm. What does the robot do?     (a) turn right (b) go forward
  12. 12.🤖 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)?
  13. 13.🤖 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
  14. 14.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 20 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 11 cm. What does the robot do?     (a) go forward (b) turn right
  16. 16.🤖 A robot is 96 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  17. 17.🤖 A robot is 42 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  18. 18.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 55. What does the robot do?     (a) go forward (b) turn left (c) stop
  19. 19.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 10. What does the robot do?     (a) stop (b) go forward (c) turn left
  20. 20.🤖 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
  21. 21.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 26 cm and the light reading is 45. What does the robot do?     (a) go forward (b) turn left (c) stop
  22. 22.🤖 A robot is 34 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  23. 23.🤖 A robot is 78 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  24. 24.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 24 cm and the light reading is 85. What does the robot do?     (a) turn left (b) go forward (c) stop
  25. 25.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) go forward (b) turn right
  26. 26.🤖 A robot is 81 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.🤖 A robot is 40 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  28. 28.🤖 A robot is 80 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.🤖 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
  30. 30.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) turn right (b) go forward
  31. 31.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 26 cm and the light reading is 70. What does the robot do?     (a) go forward (b) stop (c) turn left
  32. 32.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 60. What does the robot do?     (a) go forward (b) turn left (c) stop
  33. 33.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 80. What does the robot do?     (a) turn left (b) go forward (c) stop
  34. 34.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 11 cm. What does the robot do?     (a) go forward (b) turn right
  35. 35.🤖 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
  36. 36.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 24 cm and the light reading is 10. What does the robot do?     (a) go forward (b) stop (c) turn left
  37. 37.🤖 A robot is 81 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  38. 38.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 21 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 27 cm. What does the robot do?     (a) go forward (b) turn right
  40. 40.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 29 cm and the light reading is 30. What does the robot do?     (a) turn left (b) stop (c) go forward

Answer key

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

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