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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 718 · 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 right } else { go forward }
    The bumper is pressed. What does the robot do?     (a) back up and turn right (b) go forward
  2. 2.🤖 Obstacle avoiding: what should a robot do when something is close? (a) stop or turn away (b) push it hard (c) close its eyes (d) speed up
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 20 cm and the light reading is 15. What does the robot do?     (a) turn left (b) stop (c) go forward
  4. 4.🤖 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) stop (b) turn left (c) go forward
  5. 5.🤖 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
  6. 6.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 36 cm. What does the robot do?     (a) turn right (b) go forward
  7. 7.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 20. What does the robot do?     (a) turn left (b) go forward (c) stop
  8. 8.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the else part (b) both parts (c) the if part (d) neither part
  9. 9.🤖 What does an “if” let a robot do? (a) go faster always (b) choose using a sensor (c) skip all sensors (d) charge itself
  10. 10.🤖 A robot is 44 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 (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
  12. 12.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 90. What does the robot do?     (a) stop (b) go forward (c) turn left
  13. 13.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do?     (a) go forward (b) turn right
  14. 14.🤖 A robot is 103 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  15. 15.🤖 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
  16. 16.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 39 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 19 cm and the light reading is 25. What does the robot do?     (a) stop (b) turn left (c) go forward
  18. 18.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 8 cm and the light reading is 20. What does the robot do?     (a) go forward (b) stop (c) turn left
  19. 19.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 9 cm. What does the robot do?     (a) turn right (b) go forward
  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 75. What does the robot do?     (a) turn left (b) go forward (c) stop
  21. 21.🤖 A robot is 47 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.🤖 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) turn left (b) go forward (c) stop
  23. 23.🤖 A robot is 41 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 19 cm and the light reading is 35. What does the robot do?     (a) go forward (b) turn left (c) stop
  25. 25.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 7 cm. What does the robot do?     (a) go forward (b) turn right
  26. 26.🤖 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
  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 15. What does the robot do?     (a) turn left (b) go forward (c) stop
  28. 28.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 36 cm and the light reading is 40. What does the robot do?     (a) go forward (b) turn left (c) stop
  29. 29.🤖 A robot is 97 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 107 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 < 30) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) turn right (b) go forward
  32. 32.🤖 A robot is 35 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  33. 33.🤖 A robot is 98 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  34. 34.🤖 A robot is 39 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  35. 35.🤖 A robot is 79 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 < 10) { turn right } else { go forward }
    The distance sensor reads 1 cm. What does the robot do?     (a) turn right (b) go forward
  37. 37.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 12 cm. What does the robot do?     (a) go forward (b) turn right
  38. 38.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 25. What does the robot do?     (a) stop (b) turn left (c) go forward
  39. 39.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 40. What does the robot do?     (a) stop (b) turn left (c) go forward
  40. 40.🤖 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)?

Answer key

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

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