Range operator (..) and in operator in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a range from 1 to 5.

Kotlin

val numbers = 1 [1] 5

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

Auntil

B...

C..

Dto

Attempts:

3 left

💡 Hint

Common Mistakes

Using '...' which is not a valid range operator in Kotlin.

Using 'until' which excludes the end value.

The .. operator creates a range including both start and end values.

2fill in blank

medium

Complete the code to check if 3 is inside the range from 1 to 5.

Kotlin

val isInRange = 3 [1] 1..5

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

A==

Bin

Ccontains

Dnot in

Attempts:

3 left

💡 Hint

Common Mistakes

Using '==' which checks equality, not membership.

Using 'not in' which checks the opposite.

The in operator checks if a value is inside a range.

3fill in blank

hard

Fix the error in the code to check if 10 is not in the range from 1 to 5.

Kotlin

val check = 10 [1] 1..5

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

A!=

Bin

Ccontains

Dnot in

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'in' which checks if the value is inside.

Using '!=' which checks inequality, not range membership.

The not in operator checks if a value is outside the range.

4fill in blank

hard

Fill both blanks to create a range from 5 to 10 and check if 7 is inside it.

Kotlin

val range = [1] [2] 10
val result = 7 in range

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

A5

B..

Cuntil

Dto

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'until' which excludes the end value.

Using 'to' which creates a Pair, not a range.

Use 5 as the start and .. to create an inclusive range to 10.

5fill in blank

hard

Fill all three blanks to create a range from 'a' to 'z' and check if 'm' is inside it.

Kotlin

val letters = [1] [2] [3]
val containsM = 'm' in letters

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

A'a'

B..

C'z'

Duntil

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'until' which excludes the end character.

Using double quotes instead of single quotes for characters.

Use 'a' as start, .. as range operator, and 'z' as end.