Kotlin by Example: Functions

In Kotlin, functions are declared using the `fun` keyword. The function declaration should define the type of the parameters.	fun add(a: Int, b: Int): Int { return a + b }
Short functions can be defined more concisely using an expression body.	fun mul(a: Int, b: Int): Int = a * b
Functions which don't return a value have the `Unit` return type.	fun greet(name: String): Unit { println("Hello, " + name) }
If the return type is omitted from the declaration, it will be inferred. To avoid accidental changes to the API, it is not recommended to do this for libraries.	fun main() {
Functions can be called using familiar syntax.	greet("Alice") println(add(mul(3, 5), 1))
Calls to member functions also use familiar syntax.	println("kotlin".uppercase()) }

$ kotlinc main.kt -include-runtime -d main.jar

$ java -jar Main.jar

Hello, Alice

KOTLIN