Kotlin REPL and script mode - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Hello, Kotlin!" in Kotlin REPL.

Kotlin

println([1])

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

AHello Kotlin

B"Hello, Kotlin!"

C'Hello, Kotlin!'

DHello, Kotlin!

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting to use quotes around the string

Using single quotes which are for characters, not strings

In Kotlin, strings must be enclosed in double quotes. So to print a string, use println("string").

2fill in blank

medium

Complete the Kotlin script to declare a variable with value 10.

Kotlin

val number: Int = [1]

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

Aten

B"10"

C10

D10.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using quotes which makes the value a string

Using a decimal number for an Int type

To assign an integer value to a variable, use the number without quotes. Quotes make it a string.

3fill in blank

hard

Fix the error in the Kotlin script to print the sum of two numbers.

Kotlin

val sum = 5 [1] 3
println(sum)

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

A+

B-

C*

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using subtraction or multiplication instead of addition

Using division which changes the result

The plus sign (+) adds two numbers in Kotlin.

4fill in blank

hard

Fill both blanks to create a Kotlin map of words to their lengths.

Kotlin

val lengths = mapOf([1] to [2])

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

A"apple"

B5

C"banana"

D6

Attempts:

3 left

💡 Hint

Common Mistakes

Using numbers as keys without quotes

Mixing up keys and values

Use a string as the key and its length as the value in the map.

5fill in blank

hard

Fill all three blanks to create a Kotlin script that filters a list for numbers greater than 3.

Kotlin

val filtered = listOf(1, 2, 3, 4, 5).filter { it [1] [2] }
println(filtered[3])

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

A>

B3

C.joinToString()

D.toString()

Attempts:

3 left

💡 Hint

Common Mistakes

Using less than instead of greater than

Printing the list without formatting

The filter uses > 3 to select numbers greater than 3. The result is printed as a joined string.