← If / else with sensors lesson New set →

Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 472 · 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) go forward (b) back up and turn left
  2. 2.🤖 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)?
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 19 cm and the light reading is 20. What does the robot do?     (a) turn left (b) go forward (c) stop
  4. 4.🤖 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
  5. 5.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 40 cm and the light reading is 45. What does the robot do?     (a) stop (b) go forward (c) turn left
  6. 6.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 21 cm and the light reading is 25. What does the robot do?     (a) turn left (b) stop (c) go forward
  7. 7.🤖 What does an “if” let a robot do? (a) go faster always (b) charge itself (c) choose using a sensor (d) skip all sensors
  8. 8.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) go forward (b) turn right
  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.🤖 A robot is 61 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  11. 11.🤖 A robot is 60 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  12. 12.🤖 A robot is 52 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  13. 13.🤖 A robot is 38 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 18 cm and the light reading is 15. What does the robot do?     (a) turn left (b) stop (c) go forward
  15. 15.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) go forward (b) turn right
  16. 16.🤖 A robot is 56 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  17. 17.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 25. What does the robot do?     (a) stop (b) turn left (c) go forward
  18. 18.🤖 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)?
  19. 19.🤖 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
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 37 cm and the light reading is 10. What does the robot do?     (a) stop (b) go forward (c) turn left
  21. 21.🤖 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
  22. 22.🤖 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
  23. 23.🤖 Obstacle avoiding: what should a robot do when something is close? (a) push it hard (b) close its eyes (c) stop or turn away (d) speed up
  24. 24.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 28 cm. What does the robot do?     (a) go forward (b) turn right
  25. 25.🤖 A robot is 101 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  26. 26.🤖 A robot is 39 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  27. 27.🤖 A robot is 42 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  28. 28.🤖 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)?
  29. 29.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 12 cm. What does the robot do?     (a) go forward (b) turn right
  30. 30.🤖 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)?
  31. 31.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 24 cm and the light reading is 35. What does the robot do?     (a) turn left (b) go forward (c) stop
  32. 32.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) go forward (b) turn right
  33. 33.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 17 cm and the light reading is 45. What does the robot do?     (a) go forward (b) stop (c) turn left
  34. 34.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 17 cm and the light reading is 30. What does the robot do?     (a) stop (b) turn left (c) go forward
  35. 35.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 28 cm. What does the robot do?     (a) turn right (b) go forward
  36. 36.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 9 cm and the light reading is 10. What does the robot do?     (a) turn left (b) go forward (c) stop
  37. 37.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 70. What does the robot do?     (a) go forward (b) turn left (c) stop
  38. 38.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 12 cm. What does the robot do?     (a) go forward (b) turn right
  39. 39.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) go forward (b) turn right
  40. 40.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) go forward (b) turn right

Answer key

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

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids