Comparison operators (==, <, >, >=, <=) in Firebase - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the user's age is exactly 18.

Firebase

if (user.age [1] 18) {
  console.log('User is 18 years old');
}

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

A>

B<=

C!=

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using = instead of == which assigns rather than compares.

Using != which checks for inequality.

The == operator checks if two values are equal. Here, it checks if user.age is exactly 18.

2fill in blank

medium

Complete the code to check if the temperature is greater than 30 degrees.

Firebase

if (temperature [1] 30) {
  console.log('It is hot outside');
}

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

A>

B<

C==

D<=

Attempts:

3 left

💡 Hint

Common Mistakes

Using < which checks for less than.

Using == which checks for equality.

The > operator checks if the left value is greater than the right value. Here, it checks if temperature is above 30.

3fill in blank

hard

Fix the error in the code to check if the score is less than or equal to 100.

Firebase

if (score [1] 100) {
  console.log('Score is within limit');
}

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

A<

B<=

C=>

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using => which is not a valid comparison operator.

Using only < which excludes equality.

The correct operator for 'less than or equal to' is <=. The option => is invalid syntax.

4fill in blank

hard

Fill both blanks to check if the user's score is between 50 and 100 inclusive.

Firebase

if (score [1] 50 && score [2] 100) {
  console.log('Score is in range');
}

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

A>=

B<

C<=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using > instead of >= excludes 50.

Using < instead of <= excludes 100.

The condition checks if score is greater than or equal to 50 and less than or equal to 100. So, use >= and <=.

5fill in blank

hard

Fill all three blanks to filter users with age greater than 18, score less than 100, and status equal to 'active'.

Firebase

if (user.age [1] 18 && user.score [2] 100 && user.status [3] 'active') {
  console.log('User is eligible');
}

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

A>

B<

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using != instead of == for status check.

Mixing up < and > for age and score.

The conditions check if user.age is greater than 18, user.score is less than 100, and user.status equals 'active'. So use >, <, and ==.