Go Program to Print Hello World

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1. Introduction

Golang, commonly known as Go, is an open-source programming language that makes it easy to build simple, reliable, and efficient software. In this tutorial, we will write a very simple "Hello, World!" program in the Go programming language.

2. Program Overview

The primary objective is to create a Golang program that gracefully outputs the message "Hello, World!" to the console.

3. Code Program

// Declare the main package: the entry point for the application.
package main

// Import the fmt package for formatted I/O operations.
import "fmt"

// main function: the primary function that will be executed when the program runs.
func main() {
    // Use the Println function from fmt package to print "Hello, World!" to the console.
    fmt.Println("Hello, World!")
}

Output:

Hello, World!

4. Step By Step Explanation

1. Package Declaration:

Every Go program starts with a package declaration. Here, we've declared the main package, signaling that our program is a standalone executable.

// Declare the main package: the entry point for the application.
package main

2. Import Statement:

By importing the fmt package, we gain access to various formatted I/O operations.

// Import the fmt package for formatted I/O operations.
import "fmt"

3. Main Function:

The main function serves as our program's entry point. When the program is executed, it starts by running this function.

// main function: the primary function that will be executed when the program runs.
func main() {
    // Use the Println function from fmt package to print "Hello, World!" to the console.
    fmt.Println("Hello, World!")
}

4. Print Function:

Inside our main function, we've called the fmt.Println() method. This function prints the string passed to it followed by a newline. In our case, it prints "Hello, World!" to the console.

    // Use the Println function from fmt package to print "Hello, World!" to the console.
    fmt.Println("Hello, World!")