← If / else with sensors lesson New set →

Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 799 · 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.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) both parts (b) neither part (c) the else part (d) the if part
  2. 2.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 70. What does the robot do?     (a) turn left (b) go forward (c) stop
  3. 3.🤖 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
  4. 4.🤖 Obstacle avoiding: what should a robot do when something is close? (a) push it hard (b) stop or turn away (c) speed up (d) close its eyes
  5. 5.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) go forward (b) turn right
  6. 6.🤖 A robot is 82 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  7. 7.🤖 A robot is 105 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  8. 8.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 3 cm. What does the robot do?     (a) go forward (b) turn right
  9. 9.🤖 What does an “if” let a robot do? (a) go faster always (b) choose using a sensor (c) skip all sensors (d) charge itself
  10. 10.🤖 A robot is 63 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 91 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  12. 12.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 29 cm. What does the robot do?     (a) turn right (b) go forward
  13. 13.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 15. What does the robot do?     (a) go forward (b) stop (c) turn left
  14. 14.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do?     (a) turn right (b) go forward
  15. 15.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 40. What does the robot do?     (a) stop (b) turn left (c) go forward
  16. 16.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 37 cm. What does the robot do?     (a) go forward (b) turn right
  17. 17.🤖 A robot is 97 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  18. 18.🤖 A robot is 34 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  19. 19.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 36 cm. What does the robot do?     (a) go forward (b) turn right
  20. 20.🤖 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
  21. 21.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 30. What does the robot do?     (a) stop (b) turn left (c) go forward
  22. 22.🤖 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
  23. 23.🤖 A robot is 58 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  24. 24.🤖 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) turn left (b) stop (c) go forward
  25. 25.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 34 cm. What does the robot do?     (a) go forward (b) turn right
  26. 26.🤖 A robot is 92 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 64 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  28. 28.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) turn right (b) go forward
  29. 29.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 85. What does the robot do?     (a) go forward (b) stop (c) turn left
  30. 30.🤖 A robot is 40 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 28 cm. What does the robot do?     (a) go forward (b) turn right
  32. 32.🤖 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
  33. 33.🤖 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)?
  34. 34.🤖 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
  35. 35.🤖 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
  36. 36.🤖 A robot is 50 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  37. 37.🤖 A robot is 99 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  38. 38.🤖 A robot is 81 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  39. 39.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 40. What does the robot do?     (a) turn left (b) stop (c) go forward
  40. 40.🤖 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

Answer key

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

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