Kotlin Typing Practice
Master Kotlin syntax with real-world code examples. Practice typing Kotlin code to boost your development speed and reduce syntax errors.
Start Kotlin PracticeWhy Practice Kotlin Typing?
Null Safety
Master the ? and !! operators, plus the Elvis operator ?:.
Lambdas and Higher-Order Functions
Practice { } lambda syntax and the it keyword.
Data Classes and Sealed Classes
Get familiar with data class and sealed class declarations.
Extension Functions
Smoothly type syntax for adding functions to existing classes.
Common Kotlin Syntax
Practice these common Kotlin syntax patterns for smooth coding:
val name: String?data class User(val id: Int)list.filter { it > 0 }fun String.extend()