Kotlin Getting started with Kotlin Hello World
Example
All Kotlin programs start at the main function. Here is an example of a simple Kotlin "Hello World" program:
package my.program
fun main(args: Array<String>) {
println("Hello, world!")
}
Place the above code into a file named Main.kt (this filename is entirely arbitrary)
When targeting the JVM, the function will be compiled as a static method in a class with a name derived from the filename. In the above example, the main class to run would be my.program.MainKt.
To change the name of the class that contains top-level functions for a particular file, place the following annotation at the top of the file above the package statement:
@file:JvmName("MyApp")
In this example, the main class to run would now be my.program.MyApp.
See also:
- Package level functions including
@JvmNameannotation. - Annotation use-site targets
