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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 7 · 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 < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 65. What does the robot do?     (a) turn left (b) go forward (c) stop
  2. 2.🤖 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
  3. 3.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is pressed. What does the robot do?     (a) back up and turn left (b) go forward
  4. 4.🤖 A robot is 36 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  5. 5.🤖 What does an “if” let a robot do? (a) choose using a sensor (b) charge itself (c) go faster always (d) skip all sensors
  6. 6.🤖 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
  7. 7.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 4 cm. What does the robot do?     (a) turn right (b) go forward
  8. 8.🤖 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) stop (b) go forward (c) turn left
  9. 9.🤖 A robot is 31 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  10. 10.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 14 cm and the light reading is 15. What does the robot do?     (a) go forward (b) turn left (c) stop
  11. 11.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 11 cm. What does the robot do?     (a) go forward (b) turn right
  12. 12.🤖 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
  13. 13.🤖 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
  14. 14.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 18 cm. What does the robot do?     (a) turn right (b) go forward
  15. 15.🤖 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)?
  16. 16.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 8 cm and the light reading is 80. 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 7 cm and the light reading is 50. What does the robot do?     (a) stop (b) go forward (c) turn left
  18. 18.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 20. What does the robot do?     (a) turn left (b) stop (c) go forward
  19. 19.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 15. What does the robot do?     (a) go forward (b) stop (c) turn left
  20. 20.🤖 A robot is 102 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.🤖 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
  22. 22.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 9 cm. What does the robot do?     (a) go forward (b) turn right
  23. 23.🤖 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
  24. 24.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) go forward (b) turn right
  25. 25.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) turn right (b) go forward
  26. 26.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) turn right (b) go forward
  27. 27.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 7 cm. What does the robot do?     (a) go forward (b) turn right
  28. 28.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 9 cm and the light reading is 35. What does the robot do?     (a) turn left (b) stop (c) go forward
  29. 29.🤖 A robot is 59 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  30. 30.🤖 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
  31. 31.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) turn right (b) go forward
  32. 32.🤖 A robot is 38 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  33. 33.🤖 A robot is 68 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 43 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  35. 35.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 17 cm and the light reading is 50. What does the robot do?     (a) stop (b) go forward (c) turn left
  36. 36.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 90. What does the robot do?     (a) turn left (b) go forward (c) stop
  37. 37.🤖 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
  38. 38.🤖 A robot is 53 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 69 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  40. 40.🤖 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

Answer key

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

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