Lära Understanding the Kotlin Main Function | Getting Started with Kotlin

The main function in Kotlin is the starting point for every Kotlin application. When you run a Kotlin program, execution always begins with this function. The main function tells the Kotlin runtime where your program should start, and it is required for any standalone application. The standard syntax for the main function in Kotlin is:

fun main() { /* ... */ }

You can also accept command-line arguments by defining the main function as:

fun main(args: Array<String>) { /* ... */ }

The main function must be named exactly "main" and must be defined at the top level of a Kotlin file. This ensures that the Kotlin runtime can locate and execute your code properly.

Main.kt


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package com.example

fun main() {
    println("Welcome to your first Kotlin program!")
}

When you run the program above, the Kotlin runtime looks for the main function as the entry point. The code inside the main function is executed first. In this example, the println statement is called, which prints "Welcome to your first Kotlin program!" to the console. If your project does not include a correctly defined main function, the program will not start, and you will see an error. Therefore, always ensure that your Kotlin applications include a properly defined main function to serve as the entry point for execution.

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