Go Program to Print Hello World

Introduction

Printing "Hello, World!" is one of the simplest and most common exercises when learning a new programming language. This guide will show you how to write a basic Go program that prints "Hello, World!" to the console.

Problem Statement

Create a Go program that:

• Prints the message "Hello, World!" to the console.

Example:

• Output: Hello, World!

Solution Steps

1. Import the fmt Package: Use import "fmt" to include the fmt package, which provides I/O formatting functions like Println.
2. Write the Main Function: Define the main function, which is the entry point of every Go program.
3. Print the Message: Use fmt.Println to print "Hello, World!" to the console.

Go Program

package main

import "fmt"

/**
 * Go Program to Print "Hello, World!"
 * Author: https://www.javaguides.net/
 */
func main() {
    // Step 1: Print the message "Hello, World!" to the console
    fmt.Println("Hello, World!")
}

Explanation

Step 1: Import the fmt Package

• The fmt package is imported to provide functions for formatted I/O, such as Println for printing to the console.

Step 2: Write the Main Function

• The main function is the starting point of the Go program. It is defined using the func keyword, followed by the function name main.

Step 3: Print the Message

• The fmt.Println function is used to print the string "Hello, World!" to the console. The Println function automatically adds a newline at the end of the output.

Output Example

Example:

Hello, World!

Conclusion

This Go program demonstrates how to print "Hello, World!" to the console, which is a fundamental exercise when starting with Go programming. It introduces basic concepts such as importing packages, defining the main function, and printing output, making it a perfect example for beginners learning Go.