Number literal formats (underscore, hex, binary) in Kotlin - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to declare an integer with underscores for readability.

Kotlin

val number = 1[1]000_000

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

A_

B-

C.

D,

Attempts:

3 left

💡 Hint

Common Mistakes

Using commas or dots inside number literals causes syntax errors.

Trying to use hyphens '-' inside numbers is invalid.

In Kotlin, underscores can be used inside number literals to improve readability, like 1_000_000.

2fill in blank

medium

Complete the code to declare a hexadecimal number literal.

Kotlin

val hexNumber = [1]FF

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

A0x

B0o

C0d

D0b

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0b which is for binary numbers.

Using 0d or 0o which are invalid prefixes in Kotlin.

Hexadecimal literals in Kotlin start with 0x followed by hex digits.

3fill in blank

hard

Fix the error in the binary number literal declaration.

Kotlin

val binaryNumber = [1]1010_1010

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

A0d

B0x

C0b

D0o

Attempts:

3 left

💡 Hint

Common Mistakes

Using 0x which is for hexadecimal numbers.

Using 0d or 0o which are invalid prefixes.

Binary literals in Kotlin start with 0b followed by binary digits.

4fill in blank

hard

Fill both blanks to create a hexadecimal number with underscores.

Kotlin

val color = [1]FF[2]00FF

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

A0x

B_

C0b

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using hyphens instead of underscores.

Using binary prefix 0b for hex numbers.

Hexadecimal literals start with 0x. Underscores can separate digits for readability.

5fill in blank

hard

Fill all three blanks to declare a binary number with underscores and the correct prefix.

Kotlin

val mask = [1]1010[2]1010[3]1111

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

A0b

B_

C0x

D-

Attempts:

3 left

💡 Hint

Common Mistakes

Using hexadecimal prefix 0x for binary numbers.

Using hyphens instead of underscores.

Binary literals start with 0b. Underscores _ can separate digits for clarity.