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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 927 · 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 33 cm. What does the robot do?     (a) go forward (b) turn right
  2. 2.🤖 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
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 32 cm and the light reading is 55. What does the robot do?     (a) turn left (b) go forward (c) stop
  4. 4.🤖 A robot is 101 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  5. 5.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 8 cm. What does the robot do?     (a) go forward (b) turn right
  6. 6.🤖 A robot is 33 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  7. 7.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 90. What does the robot do?     (a) stop (b) turn left (c) go forward
  8. 8.🤖 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
  9. 9.🤖 What does an “if” let a robot do? (a) choose using a sensor (b) skip all sensors (c) charge itself (d) go faster always
  10. 10.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 11 cm. What does the robot do?     (a) turn right (b) go forward
  11. 11.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 36 cm. What does the robot do?     (a) turn right (b) go forward
  12. 12.🤖 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
  13. 13.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) push it hard (c) stop or turn away (d) speed up
  14. 14.🤖 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
  15. 15.🤖 A robot is 105 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) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) go forward (b) turn right
  17. 17.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 10 cm. What does the robot do?     (a) turn right (b) go forward
  18. 18.🤖 A robot is 86 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  19. 19.🤖 A robot is 70 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  20. 20.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the if part (b) neither part (c) the else part (d) both parts
  21. 21.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) turn right (b) go forward
  22. 22.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 7 cm and the light reading is 15. What does the robot do?     (a) stop (b) go forward (c) turn left
  23. 23.🤖 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
  24. 24.🤖 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
  25. 25.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 29 cm. What does the robot do?     (a) turn right (b) go forward
  26. 26.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 40 cm. What does the robot do?     (a) go forward (b) turn right
  27. 27.🤖 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)?
  28. 28.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) turn right (b) go forward
  29. 29.🤖 A robot is 63 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 85 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 21 cm. What does the robot do?     (a) go forward (b) turn right
  32. 32.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 40. What does the robot do?     (a) turn left (b) stop (c) go forward
  33. 33.🤖 A robot is 49 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 9 cm and the light reading is 55. What does the robot do?     (a) go forward (b) stop (c) turn left
  35. 35.🤖 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
  36. 36.🤖 A robot is 103 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 < 10) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do?     (a) go forward (b) turn right
  38. 38.🤖 A robot is 107 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 73 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 < 30) { turn right } else { go forward }
    The distance sensor reads 38 cm. What does the robot do?     (a) turn right (b) go forward

Answer key

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

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