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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 159 · 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 < 30) { turn right } else { go forward }
    The distance sensor reads 42 cm. What does the robot do?     (a) turn right (b) go forward
  2. 2.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 9 cm and the light reading is 85. What does the robot do?     (a) go forward (b) stop (c) turn left
  3. 3.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) go forward (b) turn right
  4. 4.🤖 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
  5. 5.🤖 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
  6. 6.🤖 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
  7. 7.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 35 cm and the light reading is 10. What does the robot do?     (a) turn left (b) stop (c) go forward
  8. 8.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) turn right (b) go forward
  9. 9.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) go forward (b) turn right
  10. 10.🤖 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)?
  11. 11.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 6 cm and the light reading is 40. What does the robot do?     (a) go forward (b) turn left (c) stop
  12. 12.🤖 A robot is 92 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.🤖 A robot is 64 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  14. 14.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 19 cm and the light reading is 30. What does the robot do?     (a) stop (b) turn left (c) go forward
  15. 15.🤖 What does an “if” let a robot do? (a) skip all sensors (b) charge itself (c) choose using a sensor (d) go faster always
  16. 16.🤖 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
  17. 17.🤖 A robot is 107 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  18. 18.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 18 cm. What does the robot do?     (a) turn right (b) go forward
  19. 19.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) turn right (b) go forward
  20. 20.🤖 A robot is 37 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  21. 21.🤖 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
  22. 22.🤖 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
  23. 23.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 14 cm and the light reading is 75. What does the robot do?     (a) turn left (b) go forward (c) stop
  24. 24.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do?     (a) go forward (b) turn right
  25. 25.🤖 A robot is 75 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.🤖 Obstacle avoiding: what should a robot do when something is close? (a) push it hard (b) close its eyes (c) stop or turn away (d) speed up
  27. 27.🤖 A robot is 45 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  28. 28.🤖 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
  29. 29.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 50. What does the robot do?     (a) go forward (b) stop (c) turn left
  30. 30.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) turn right (b) go forward
  31. 31.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) go forward (b) turn right
  32. 32.🤖 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
  33. 33.🤖 A robot is 67 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 < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 85. What does the robot do?     (a) turn left (b) stop (c) go forward
  35. 35.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) go forward (b) turn right
  36. 36.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 12 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 37 cm and the light reading is 50. What does the robot do?     (a) turn left (b) stop (c) go forward
  38. 38.🤖 A robot is 59 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  39. 39.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) go forward (b) turn right
  40. 40.🤖 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)?

Answer key

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

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