Comparison operators in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a is equal to b.

Kotlin

val result = (a [1] b)
println(result)

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

A=

B==

C!=

D===

Attempts:

3 left

💡 Hint

Common Mistakes

Using single = which is assignment, not comparison.

In Kotlin, == checks if two values are equal.

2fill in blank

medium

Complete the code to check if x is greater than y.

Kotlin

if (x [1] y) {
    println("x is greater")
}

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

A>

B>=

C<=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using < instead of >.

The > operator checks if the left value is greater than the right value.

3fill in blank

hard

Fix the error in the code to check if num is not equal to 10.

Kotlin

val check = (num [1] 10)
println(check)

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

A=

B==

C!=

D<>

Attempts:

3 left

💡 Hint

Common Mistakes

Using = which is assignment, or <> which is not valid in Kotlin.

The != operator checks if two values are not equal in Kotlin.

4fill in blank

hard

Fill both blanks to create a map of words to their lengths, but only for words longer than 3 characters.

Kotlin

val lengths = words.filter { word -> word.length > 3 }.associate { word -> [1] to [2] }

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Aword

Bword.length

Cword.size

Dword.count()

Attempts:

3 left

💡 Hint

Common Mistakes

Using word.size or word.count() which are not properties of String in Kotlin.

The key should be the word itself, and the value should be its length using word.length.

5fill in blank

hard

Fill all three blanks to filter a map to only include entries where the value is greater than 5.

Kotlin

val filtered = map.filter { ([1], [2]) -> [2] [3] 5 }

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

Akey

Bvalue

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using < instead of >, or mixing up key and value.

In the lambda, key and value represent the map entry. We check if value > 5.