Exploring "Hello World" Across C#, JavaScript, Python, and TypeScript

"Hello World" Across Four Programming Languages

When diving into programming, the "Hello World" example serves as a fun, straightforward introduction to understanding how a language works. From function definitions to variable naming conventions, each programming language has its unique style. Let’s explore this concept using four popular languages: C#, JavaScript, Python, and TypeScript.

1. Hello World in C#

C# is a statically typed, object-oriented language commonly used for building Windows applications and games. Functions in C# are explicitly declared with a return type and encapsulated within a class.

using System;
class Program
{
    // Method to display Hello World
    static void DisplayMessage()
    {
        // Declare a variable to hold the message
        string message = "Hello, World!";
        Console.WriteLine(message); // Print the message to the console
    }
    static void Main()
    {
        DisplayMessage(); // Call the method
    }
}

• Function Definition: Functions are defined with a return type (void here) and must be inside a class.
• Variable Naming: Variables use camelCase (e.g., message).
• Console Output: Console.WriteLine() is used to print to the console.

2. Hello World in JavaScript

JavaScript is a dynamically typed language widely used for web development. Functions are defined using the function keyword or arrow function syntax.

function displayMessage() {
    // Declare a variable to hold the message
    let message = "Hello, World!";
    console.log(message); // Print the message to the console
}

displayMessage(); // Call the function

• Function Definition: Functions are defined with the function keyword (or arrow functions for modern syntax).
• Variable Naming: Variables use camelCase (message), declared using let, const, or var.
• Console Output: console.log() is the standard for logging output.

3. Hello World in Python

Python is a dynamically typed, interpreted language known for its simplicity. Functions are defined using the def keyword.

def display_message():
    # Declare a variable to hold the message
    message = "Hello, World!"
    print(message) # Print the message to the console

display_message() # Call the function

• Function Definition: Functions are defined using def, and indentation is crucial for defining their scope.
• Variable Naming: Python uses snake_case for variable names (message).
• Console Output: print() is used for printing output.

4. Hello World in TypeScript

TypeScript is a superset of JavaScript, adding static typing and other enhancements. Function syntax is similar to JavaScript but can include type annotations.

function displayMessage(): void {
    // Declare a variable with a type annotation
    let message: string = "Hello, World!";
    console.log(message); // Print the message to the console
}

displayMessage(); // Call the function

• Function Definition: Similar to JavaScript, but type annotations (: void) can be added for clarity.
• Variable Naming: CamelCase is used (message), with optional type annotations (string).
• Console Output: Uses console.log() like JavaScript.

Comparative Overview