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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 505 · 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 not 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) speed up (d) close its eyes
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 70. 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 11 cm and the light reading is 50. What does the robot do?     (a) turn left (b) go forward (c) stop
  5. 5.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 15 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 26 cm and the light reading is 20. What does the robot do?     (a) stop (b) go forward (c) turn left
  7. 7.🤖 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
  8. 8.🤖 A robot is 94 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) back up and turn right (b) go forward
  10. 10.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 45. What does the robot do?     (a) stop (b) go forward (c) turn left
  11. 11.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 60. What does the robot do?     (a) turn left (b) go forward (c) stop
  12. 12.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 12 cm. What does the robot do?     (a) turn right (b) go forward
  13. 13.🤖 A robot is 82 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 29 cm and the light reading is 40. 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) choose using a sensor (c) go faster always (d) charge itself
  16. 16.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 20 cm and the light reading is 60. What does the robot do?     (a) turn left (b) go forward (c) stop
  17. 17.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 33 cm. What does the robot do?     (a) turn right (b) go forward
  18. 18.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) turn right (b) go forward
  19. 19.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) neither part (b) both parts (c) the else part (d) the if part
  20. 20.🤖 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)?
  21. 21.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do?     (a) go forward (b) turn right
  22. 22.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 39 cm. What does the robot do?     (a) go forward (b) turn right
  23. 23.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 33 cm. What does the robot do?     (a) turn right (b) go forward
  24. 24.🤖 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
  25. 25.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 6 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 5 cm. What does the robot do?     (a) go forward (b) turn right
  27. 27.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do?     (a) go forward (b) turn right
  28. 28.🤖 A robot is 36 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.🤖 A robot is 91 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 74 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  31. 31.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) turn right (b) go forward
  32. 32.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) turn right (b) go forward
  33. 33.🤖 A robot is 98 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 (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
  35. 35.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) turn right (b) go forward
  36. 36.🤖 A robot is 95 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.🤖 A robot is 84 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  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 81 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  40. 40.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) turn right (b) go forward

Answer key

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

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