Why loop control is required in Javascript - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a loop that runs 5 times.

Javascript

for(let i = 0; i [1] 5; i++) {
  console.log(i);
}

Drag options to blanks, or click blank then click option'

A>=

B>

C<=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using > instead of < causes the loop to never run.

The loop should run while i is less than 5, so it runs 5 times from 0 to 4.

2fill in blank

medium

Complete the code to stop the loop when i equals 3.

Javascript

for(let i = 0; i < 5; i++) {
  if(i [1] 3) {
    break;
  }
  console.log(i);
}

Drag options to blanks, or click blank then click option'

A==

B!=

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using != will break the loop for all values except 3.

The loop should stop when i is equal to 3, so we use == to check equality.

3fill in blank

hard

Fix the error in the loop to skip printing when i is 2.

Javascript

for(let i = 0; i < 5; i++) {
  if(i [1] 2) {
    continue;
  }
  console.log(i);
}

Drag options to blanks, or click blank then click option'

A>

B==

C!=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using != will skip all values except 2.

To skip printing when i is 2, use == to check equality and continue the loop.

4fill in blank

hard

Fill both blanks to create a loop that prints only even numbers from 0 to 8.

Javascript

for(let i = 0; i [1] 10; i[2]) {
  if(i % 2 === 0) {
    console.log(i);
  }
}

Drag options to blanks, or click blank then click option'

A<

B++

C+=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using > will cause the loop to never run.

Using += without a number is invalid.

The loop runs while i is less than 10 and increments by 1 each time using ++.

5fill in blank

hard

Fill all three blanks to create a loop that prints numbers from 10 down to 1.

Javascript

for(let i = [1]; i [2] 0; i[3]) {
  console.log(i);
}

Drag options to blanks, or click blank then click option'

A10

B>

C--

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Starting at 0 will not print the numbers down to 1.

Using < will cause the loop to never run.

The loop starts at 10, runs while i is greater than 0, and decreases i by 1 each time using --.