Hello Kotlin

The following snippet illustrates several interesting features available in Kotlin:

fun formatName(name: String?) = name ?: "Fellow Human"

fun greetReader(greeting: String = "Hey", name: String?) = 
    println("$greeting ${formatName(name)}")

fun main(args: Array<String>) {
 greetReader("Hello!", "Reader")
 // Hello! Reader
}

As you look at these few lines of code, you will notice a few items of interest, which are as follows:

• The use of the fun keyword to define a new function
• Functions that exist outside of any enclosing class
• Demonstrations of null and non-null types
• Support for default parameter values and String templates