Kotlin-Kotlin programming language tutorial

Example

var name: String? = null if (name != null) { println(name.length) }

Scenario

Kotlin's null safety feature helps prevent NullPointerExceptions by distinguishing between nullable and non-nullable types. This is particularly useful in large applications where null references can lead to runtime crashes.

Example

fun String.lastChar(): Char = this[this.length - 1] println("Kotlin".lastChar())

Scenario

Extension functions allow developers to add new functionality to existing classes without modifying their source code. This is useful for enhancing libraries or adding utility functions to standard classes.

Example

launch { val result = async { fetchData() } println(result.await()) }

Scenario

Coroutines simplify asynchronous programming by allowing developers to write code sequentially while managing background tasks efficiently. This is crucial for applications that require smooth UI experiences and responsive performance.