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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 380 · 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.🤖 What does an “if” let a robot do? (a) go faster always (b) charge itself (c) choose using a sensor (d) skip all sensors
  3. 3.🤖 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
  4. 4.🤖 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
  5. 5.🤖 Obstacle avoiding: what should a robot do when something is close? (a) stop or turn away (b) speed up (c) close its eyes (d) push it hard
  6. 6.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) turn right (b) go forward
  7. 7.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) neither part (b) the if part (c) the else part (d) both parts
  8. 8.🤖 A robot is 68 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  9. 9.🤖 A robot is 56 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) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 32 cm and the light reading is 40. What does the robot do?     (a) turn left (b) go forward (c) stop
  11. 11.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 45. What does the robot do?     (a) stop (b) turn left (c) go forward
  12. 12.🤖 A robot is 66 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  13. 13.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 75. What does the robot do?     (a) stop (b) turn left (c) go forward
  14. 14.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 29 cm. What does the robot do?     (a) turn right (b) go forward
  15. 15.🤖 A robot is 61 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  16. 16.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 75. What does the robot do?     (a) turn left (b) stop (c) go forward
  17. 17.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 17 cm and the light reading is 10. What does the robot do?     (a) stop (b) go forward (c) turn left
  18. 18.🤖 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)?
  19. 19.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 29 cm and the light reading is 35. What does the robot do?     (a) stop (b) go forward (c) turn left
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 15. What does the robot do?     (a) turn left (b) go forward (c) stop
  21. 21.🤖 A robot is 50 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 14 cm and the light reading is 35. What does the robot do?     (a) turn left (b) go forward (c) stop
  23. 23.🤖 A robot is 59 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  24. 24.🤖 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
  25. 25.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) go forward (b) turn right
  26. 26.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 7 cm and the light reading is 55. What does the robot do?     (a) stop (b) go forward (c) turn left
  27. 27.🤖 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
  28. 28.🤖 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
  29. 29.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) turn right (b) go forward
  30. 30.🤖 A robot is 104 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  31. 31.🤖 A robot is 40 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 38 cm and the light reading is 55. What does the robot do?     (a) stop (b) turn left (c) go forward
  33. 33.🤖 A robot is 80 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  34. 34.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 37 cm. What does the robot do?     (a) go forward (b) turn right
  35. 35.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 12 cm. What does the robot do?     (a) turn right (b) go forward
  36. 36.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) go forward (b) turn right
  37. 37.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 75. What does the robot do?     (a) stop (b) go forward (c) turn left
  38. 38.🤖 A robot is 55 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  39. 39.🤖 A robot is 65 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  40. 40.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) turn right (b) go forward

Answer key

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

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