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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 63 · 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 not pressed. What does the robot do?     (a) back up and turn left (b) go forward
  2. 2.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) go forward (b) turn right
  3. 3.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 10 cm. What does the robot do?     (a) turn right (b) go forward
  4. 4.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do?     (a) go forward (b) turn right
  5. 5.🤖 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
  6. 6.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 19 cm and the light reading is 45. What does the robot do?     (a) stop (b) turn left (c) go forward
  7. 7.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 8 cm. What does the robot do?     (a) go forward (b) turn right
  8. 8.🤖 A robot is 59 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  9. 9.🤖 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
  10. 10.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) both parts (b) the else part (c) the if part (d) neither part
  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 55. What does the robot do?     (a) stop (b) go forward (c) turn left
  12. 12.🤖 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
  13. 13.🤖 What does an “if” let a robot do? (a) go faster always (b) charge itself (c) skip all sensors (d) choose using a sensor
  14. 14.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 35. What does the robot do?     (a) turn left (b) stop (c) go forward
  15. 15.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) speed up (c) stop or turn away (d) push it hard
  16. 16.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) go forward (b) turn right
  17. 17.🤖 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
  18. 18.🤖 A robot is 54 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 < 25) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) turn right (b) go forward
  20. 20.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 29 cm. What does the robot do?     (a) go forward (b) turn right
  21. 21.🤖 A robot is 100 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 35 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 56 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  24. 24.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) go forward (b) turn right
  25. 25.🤖 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
  26. 26.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) turn right (b) go forward
  27. 27.🤖 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
  28. 28.🤖 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
  29. 29.🤖 A robot is 33 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 37 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 < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 33 cm and the light reading is 75. What does the robot do?     (a) stop (b) turn left (c) go forward
  32. 32.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 18 cm. What does the robot do?     (a) go forward (b) turn right
  33. 33.🤖 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)?
  34. 34.🤖 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
  35. 35.🤖 A robot is 30 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  36. 36.🤖 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)?
  37. 37.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) turn right (b) go forward
  38. 38.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) go forward (b) turn right
  39. 39.🤖 A robot is 57 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) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 8 cm and the light reading is 70. What does the robot do?     (a) go forward (b) turn left (c) stop

Answer key

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

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