← If / else with sensors lesson New set →

Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 940 · 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) neither part (b) the else part (c) the if part (d) both parts
  2. 2.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) go forward (b) turn right
  3. 3.🤖 A robot is 59 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  4. 4.🤖 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
  5. 5.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is not pressed. What does the robot do?     (a) back up and turn left (b) go forward
  6. 6.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 12 cm and the light reading is 65. What does the robot do?     (a) stop (b) turn left (c) go forward
  7. 7.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 19 cm and the light reading is 15. What does the robot do?     (a) turn left (b) stop (c) go forward
  8. 8.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 10 cm. What does the robot do?     (a) turn right (b) go forward
  9. 9.🤖 What does an “if” let a robot do? (a) go faster always (b) skip all sensors (c) charge itself (d) choose using a sensor
  10. 10.🤖 Obstacle avoiding: what should a robot do when something is close? (a) push it hard (b) speed up (c) close its eyes (d) stop or turn away
  11. 11.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 21 cm and the light reading is 15. What does the robot do?     (a) go forward (b) turn left (c) stop
  12. 12.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 36 cm and the light reading is 30. What does the robot do?     (a) stop (b) turn left (c) go forward
  13. 13.🤖 A robot is 105 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  14. 14.🤖 A robot is 96 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  15. 15.🤖 A robot is 90 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  16. 16.🤖 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
  17. 17.🤖 A robot is 79 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  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 30. 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 27 cm and the light reading is 80. What does the robot do?     (a) stop (b) go forward (c) turn left
  20. 20.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) turn right (b) go forward
  21. 21.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 22 cm and the light reading is 70. What does the robot do?     (a) stop (b) turn left (c) go forward
  22. 22.🤖 A robot is 38 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  23. 23.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 34 cm. What does the robot do?     (a) go forward (b) turn right
  24. 24.🤖 A robot is 30 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  25. 25.🤖 A robot is 75 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  26. 26.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 16 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 15 cm. What does the robot do?     (a) go forward (b) turn right
  28. 28.🤖 A robot is 61 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  29. 29.🤖 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)?
  30. 30.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 85. What does the robot do?     (a) go forward (b) stop (c) turn left
  31. 31.🤖 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
  32. 32.🤖 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
  33. 33.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 40 cm and the light reading is 75. What does the robot do?     (a) stop (b) turn left (c) go forward
  34. 34.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 33 cm and the light reading is 80. What does the robot do?     (a) turn left (b) go forward (c) stop
  35. 35.🤖 A robot is 53 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  36. 36.🤖 A robot is 37 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 37 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.🤖 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
  39. 39.🤖 A robot is 107 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.🤖 A robot is 45 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?

Answer key

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

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