Swift Hello World Program

1. Introduction

In this guide, we'll dive into the "Hello World" program written in Swift, Apple's powerful and intuitive language designed for iOS, macOS, watchOS, and tvOS.

2. Program Overview

Our goal is to create a simple Swift program that outputs the text "Hello, World!" to the console. This will give us an opportunity to understand the basic structure of a Swift program and explore how output can be displayed.

3. Code Program

// Import the Swift standard library
import Swift

// The main function where the program execution begins
func main() {
    // Print "Hello, World!" to the console
    print("Hello, World!")
}

// Call the main function to execute the program
main()

Output:

Hello, World!

4. Step By Step Explanation

1. import Swift: This line imports the Swift standard library, which provides fundamental building blocks for crafting Swift programs.

2. func main() { ... }: This defines a function named main. It's customary in many programming languages to begin execution with a main function, though it's not strictly necessary in Swift.

3. print("Hello, World!"): Within the main function, this line uses the print function to display the text "Hello, World!" to the console.

4. main(): Finally, we call the main function to execute our program and produce the output.