Char type and Unicode behavior in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare a Char variable holding the letter 'A'.

Kotlin

val letter: Char = '[1]'

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

A"A"

B'A'

CA

D'AA'

Attempts:

3 left

💡 Hint

Common Mistakes

Using double quotes instead of single quotes for Char.

Trying to assign multiple characters to a Char.

In Kotlin, a Char is a single character enclosed in single quotes, like 'A'. Double quotes are for strings.

2fill in blank

medium

Complete the code to print the Unicode code of the Char 'Z'.

Kotlin

println([1].code)

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

A'Z'

B"Z"

C'z'

DZ

Attempts:

3 left

💡 Hint

Common Mistakes

Using double quotes instead of single quotes.

Using a variable name without quotes.

The Char 'Z' is written with single quotes. The code property gives its Unicode number.

3fill in blank

hard

Fix the error in the code to convert an Int to a Char.

Kotlin

val ch: Char = 65.[1]()

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AtoChar

BChar

CtoCharCode

Dchar

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to use Char() constructor with an Int.

Using a non-existent function like toCharCode.

In Kotlin, to convert an Int to a Char, use the toChar() function.

4fill in blank

hard

Fill both blanks to create a map of characters to their Unicode codes for letters 'a' to 'c'.

Kotlin

val map = mapOf([1] to [2], 'b' to 'b'.code, 'c' to 'c'.code)

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

A'a'

B'a'.code

C'b'

D'c'

Attempts:

3 left

💡 Hint

Common Mistakes

Using strings with double quotes instead of Chars.

Using Char without quotes.

The key is the Char 'a' and the value is its Unicode code using .code.

5fill in blank

hard

Fill all three blanks to create a list of Chars from Unicode codes 65 to 67.

Kotlin

val chars = listOf([1](65), 66.[2](), 67.[3]())

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

AChar

BtoChar

CtoChar()

Dchar

Attempts:

3 left

💡 Hint

Common Mistakes

Using toChar without parentheses.

Using lowercase 'char' which is invalid.

Use Char(65) to create a Char from code 65, or convert Int to Char with toChar(). Here, Char(65) and 66.toChar() are valid.