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JavaScript Worksheet: If and For Loops

HTML and CSS lesson 26: JavaScript if and for loops · Set 611 · 40 questions
TalentJR

Code tip (Check, then count): if (condition) { … } else { … }: only one of the two parts runs. for (let i = 0; i < 5; i++) runs for i = 0, 1, 2, 3, 4 — 5 times. With i <= n it includes n; with i = i + 2 it goes up in twos.

NameDateTime takenScore ___ / 40
  1. 1.🔁 What number does this code print?
    let total = 0;
    for (let i = 1; i <= 8; i++) {
      total = total + i;
    }
    console.log(total);
  2. 2.🔁 What does this code print?
    let age = 32;
    if (age >= 13) {
      console.log("teen");
    } else {
      console.log("child");
    }     (a) child (b) teen
  3. 3.🔁 What does i++ do? (a) doubles i (b) prints i (c) adds 1 to i (d) takes 1 from i
  4. 4.🔁 What is the LAST number this code prints?
    for (let i = 0; i < 10; i = i + 3) {
      console.log(i);
    }
  5. 5.🔁 What does this code print?
    let score = 45;
    if (score > 34) {
      console.log("You win");
    } else {
      console.log("Play again");
    }     (a) Play again (b) You win
  6. 6.🔁 How many times does this code print “Hello”?
    for (let i = 3; i < 12; i++) {
      console.log("Hello");
    }
  7. 7.🔁 What does this code print?
    let score = 12;
    if (score > 32) {
      console.log("You win");
    } else {
      console.log("Play again");
    }     (a) You win (b) Play again
  8. 8.🔁 Which loop repeats code a set number of times? (a) else (b) for (c) let (d) if
  9. 9.🔁 What number does this code print?
    let total = 0;
    for (let i = 1; i <= 5; i++) {
      total = total + 3;
    }
    console.log(total);
  10. 10.🔁 Which word runs code only when something is true? (a) log (b) if (c) let (d) for
  11. 11.🔁 What is the LAST number this code prints?
    for (let i = 0; i < 18; i = i + 2) {
      console.log(i);
    }
  12. 12.🔁 What number does this code print?
    let total = 0;
    for (let i = 1; i <= 5; i++) {
      total = total + 2;
    }
    console.log(total);
  13. 13.🔁 What is the LAST number this code prints?
    for (let i = 0; i < 15; i = i + 2) {
      console.log(i);
    }
  14. 14.🔁 What does this code print?
    let score = 3;
    if (score > 28) {
      console.log("You win");
    } else {
      console.log("Play again");
    }     (a) You win (b) Play again
  15. 15.🔁 What does this code print?
    let score = 50;
    if (score > 41) {
      console.log("You win");
    } else {
      console.log("Play again");
    }     (a) Play again (b) You win
  16. 16.🔁 What does this code print?
    let marks = 26;
    if (marks < 38) {
      console.log("Pass");
    } else {
      console.log("Try again");
    }     (a) Try again (b) Pass
  17. 17.🔁 What does this code print?
    let temp = 21;
    if (temp < 19) {
      console.log("Hot");
    } else {
      console.log("Cool");
    }     (a) Hot (b) Cool
  18. 18.🔁 How many times does this code print “Well done”?
    for (let i = 3; i <= 11; i++) {
      console.log("Well done");
    }
  19. 19.🔁 What number does this code print?
    let total = 0;
    for (let i = 1; i <= 7; i++) {
      total = total + i;
    }
    console.log(total);
  20. 20.🔁 What number does this code print?
    let total = 0;
    for (let i = 1; i <= 8; i++) {
      total = total + 2;
    }
    console.log(total);
  21. 21.🔁 How many times does this code print “Well done”?
    for (let i = 2; i <= 10; i++) {
      console.log("Well done");
    }
  22. 22.🔁 What does this code print?
    let age = 26;
    if (age >= 28) {
      console.log("teen");
    } else {
      console.log("child");
    }     (a) child (b) teen
  23. 23.🔁 What number does this code print?
    let total = 0;
    for (let i = 1; i <= 9; i++) {
      total = total + 2;
    }
    console.log(total);
  24. 24.🔁 How many times does this code print “Welcome”?
    for (let i = 1; i < 8; i++) {
      console.log("Welcome");
    }
  25. 25.🔁 How many times does this code print “Hello”?
    for (let i = 2; i <= 11; i++) {
      console.log("Hello");
    }
  26. 26.🔁 What number does this code print?
    let total = 0;
    for (let i = 1; i <= 10; i++) {
      total = total + 5;
    }
    console.log(total);
  27. 27.🔁 When does the else part run? (a) never (b) when if is true (c) when if is false (d) always
  28. 28.🔁 What number does this code print?
    let total = 0;
    for (let i = 1; i <= 9; i++) {
      total = total + 9;
    }
    console.log(total);
  29. 29.🔁 What does this code print?
    let score = 1;
    if (score >= 28) {
      console.log("You win");
    } else {
      console.log("Play again");
    }     (a) Play again (b) You win
  30. 30.🔁 What does this code print?
    let age = 10;
    if (age >= 12) {
      console.log("teen");
    } else {
      console.log("child");
    }     (a) child (b) teen
  31. 31.🔁 What does this code print?
    let age = 37;
    if (age >= 29) {
      console.log("teen");
    } else {
      console.log("child");
    }     (a) teen (b) child
  32. 32.🔁 How many numbers does this code print?
    for (let i = 0; i < 6; i = i + 3) {
      console.log(i);
    }
  33. 33.🔁 How many numbers does this code print?
    for (let i = 0; i < 20; i = i + 4) {
      console.log(i);
    }
  34. 34.🔁 What does this code print?
    let age = 5;
    if (age >= 18) {
      console.log("teen");
    } else {
      console.log("child");
    }     (a) child (b) teen
  35. 35.🔁 What does this code print?
    let marks = 47;
    if (marks > 28) {
      console.log("Pass");
    } else {
      console.log("Try again");
    }     (a) Try again (b) Pass
  36. 36.🔁 What does this code print?
    let age = 15;
    if (age > 21) {
      console.log("teen");
    } else {
      console.log("child");
    }     (a) teen (b) child
  37. 37.🔁 What does this code print?
    let score = 3;
    if (score >= 34) {
      console.log("You win");
    } else {
      console.log("Play again");
    }     (a) You win (b) Play again
  38. 38.🔁 What number does this code print?
    let total = 0;
    for (let i = 1; i <= 3; i++) {
      total = total + 5;
    }
    console.log(total);
  39. 39.🔁 What does this code print?
    let score = 50;
    if (score > 22) {
      console.log("You win");
    } else {
      console.log("Play again");
    }     (a) Play again (b) You win
  40. 40.🔁 What is the LAST number this code prints?
    for (let i = 0; i < 20; i = i + 3) {
      console.log(i);
    }

Answer key

  1. 36
  2. teen
  3. adds 1 to i
  4. 9
  5. You win
  6. 9
  7. Play again
  8. for
  9. 15
  10. if
  11. 16
  12. 10
  13. 14
  14. Play again
  15. You win
  16. Pass
  17. Cool
  18. 9
  19. 28
  20. 16
  21. 9
  22. child
  23. 18
  24. 7
  25. 10
  26. 50
  27. when if is false
  28. 81
  29. Play again
  30. child
  31. teen
  32. 2
  33. 5
  34. child
  35. Pass
  36. child
  37. Play again
  38. 15
  39. You win
  40. 18

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