Vararg parameters in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a function that accepts a variable number of integers.

Kotlin

fun printNumbers([1] numbers: Int) {
    for (number in numbers) {
        println(number)
    }
}

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

Aval

Bvar

Cvararg

Dconst

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'val' or 'var' instead of 'vararg' for variable arguments.

Forgetting to add the keyword before the parameter name.

The vararg keyword allows the function to accept a variable number of arguments.

2fill in blank

medium

Complete the code to call the function with multiple integer arguments.

Kotlin

printNumbers([1])

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

A1, 2, 3

BlistOf(1, 2, 3)

CarrayOf(1, 2, 3)

DsetOf(1, 2, 3)

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a list or array directly without the spread operator.

Using a collection type instead of separate arguments.

When calling a function with vararg parameters, you can pass multiple arguments separated by commas.

3fill in blank

hard

Fix the error in calling the function with an array argument.

Kotlin

val nums = intArrayOf(4, 5, 6)
printNumbers([1] nums)

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

Anums

B*

C*@

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the array variable directly without the spread operator.

Using incorrect symbols like '*@' or repeating '*'.

Use the spread operator * before the array to pass its elements as separate arguments.

4fill in blank

hard

Fill both blanks to define a function that accepts a string and a variable number of integers.

Kotlin

fun showDetails(name: String, [1] numbers: [2]) {
    println("Name: $name")
    for (num in numbers) {
        println(num)
    }
}

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

Avararg

BIntArray

CInt

DArray<Int>

Attempts:

3 left

💡 Hint

Common Mistakes

Using array types like IntArray or Array instead of the element type.

Omitting the vararg keyword.

The vararg keyword is used before the parameter name, and the type is Int for variable integers.

5fill in blank

hard

Fill all three blanks to create a function that sums variable integers and returns the result.

Kotlin

fun sumNumbers([1] nums: [2]): [3] {
    var total = 0
    for (n in nums) {
        total += n
    }
    return total
}

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

Avararg

BInt

DDouble

Attempts:

3 left

💡 Hint

Common Mistakes

Using Double as return type when summing integers.

Omitting vararg keyword.

The function uses vararg for variable arguments of type Int and returns an Int sum.