Main function as entry point in Kotlin - Mini Project: Build & Apply

Main function as entry point

📖 Scenario: You are creating a simple Kotlin program that prints a welcome message. Every Kotlin program needs a starting point called the main function. This is where the program begins running.

🎯 Goal: Build a Kotlin program with a main function that prints the message "Welcome to Kotlin programming!" to the screen.

📋 What You'll Learn

Create a main function with no parameters

Inside main, print the exact message: "Welcome to Kotlin programming!"

💡 Why This Matters

🌍 Real World

Every Kotlin application, from simple scripts to Android apps, starts running from the <code>main</code> function or an equivalent entry point.

💼 Career

Understanding the <code>main</code> function is essential for Kotlin developers to create runnable programs and debug application startup.

1

Create the main function

Write a Kotlin main function with no parameters. Use the syntax fun main() followed by curly braces { }.

Kotlin

fun main() {
    // Your code here
}

Need a hint?

The main function is the entry point of a Kotlin program. It looks like fun main() { }.

2

Add a print statement inside main

Inside the main function, add a line to print the text "Welcome to Kotlin programming!" using println.

Kotlin

fun main() {
    // Your code here
}

Need a hint?

Use println("text") to print text to the screen in Kotlin.

3

Check the main function syntax

Make sure the main function has the correct syntax with parentheses and curly braces, and the print statement is inside the braces.

Kotlin

fun main() {
    println("Welcome to Kotlin programming!")
    // Your code here
}

Need a hint?

The main function must have parentheses () and curly braces { }. The print line goes inside the braces.

4

Run the program and print the output

Run the Kotlin program and print the output. Use println inside main to display exactly: Welcome to Kotlin programming!

Kotlin

fun main() {
    println("Welcome to Kotlin programming!")
    // Your code here
}

Need a hint?

When you run the program, it should show the message on the screen exactly as written.