Repeat function for simple repetition in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to repeat the print statement 3 times using the repeat function.

Kotlin

repeat([1]) {
    println("Hello")
}

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

A3

B5

C0

D1

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0 will not print anything.

Using 1 will print only once, not three times.

The repeat function takes the number of times to repeat as its argument. Here, 3 repeats the print statement 3 times.

2fill in blank

medium

Complete the code to print the numbers 0 to 4 using repeat and the loop index.

Kotlin

repeat(5) { [1] ->
    println([1])
}

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

Anum

Bcount

Cindex

Di

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name not declared in the lambda.

Forgetting to use the lambda parameter to print the index.

The lambda parameter in repeat is commonly named i to represent the current index from 0 up to one less than the repeat count.

3fill in blank

hard

Fix the error in the code to correctly repeat printing "Hi" 4 times.

Kotlin

repeat([1]) {
    println("Hi")
}

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

Afour

B4

C"4"

D4L

Attempts:

3 left

💡 Hint

Common Mistakes

Passing a string like "4" causes a type error.

Using a variable name that is not defined.

The repeat function expects an integer argument without quotes. Using 4 (an Int) works correctly.

4fill in blank

hard

Fill both blanks to create a map of numbers to their squares using repeat.

Kotlin

val squares = mutableMapOf<Int, Int>()
repeat([1]) { [2] ->
    squares[[2]] = [2] * [2]
}

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

A5

Bi

Cindex

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Using a number too large or too small for the repeat count.

Using a variable name not matching the lambda parameter.

We repeat 5 times and use i as the index variable to fill the map with numbers and their squares.

5fill in blank

hard

Fill all three blanks to create a list of even numbers using repeat and an if condition.

Kotlin

val evens = mutableListOf<Int>()
repeat([1]) { [2] ->
    if ([2] % 2 == 0) {
        evens.add([2])
    }
}

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

A10

Bi

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using different variable names for the loop index in condition and add.

Repeating fewer times than needed to get all even numbers.

We repeat 10 times, use i as the index, and add i to the list if it is even.