React - Common Patterns - Complete Guide Example

Getting Started with React

Welcome to your first React program! This "Hello World" example is the traditional starting point for learning any programming language or framework. It demonstrates the basic syntax and structure you'll use in more complex applications.

What You'll Learn

• Basic syntax and structure of React
• How to write and execute your first program
• Fundamental concepts that apply to all React programs

Prerequisites

Before starting, make sure you have React installed on your system. You can verify the installation by checking the version in your terminal or command prompt.

Code Example

// React Hello World
import React from 'React';

const app = new React();

app.get('/', (req, res) => {
    res.send('Hello, World!');
});

app.listen(3000);

Explanation

This simple example demonstrates the core structure of a React program. Each line serves a specific purpose:

• The program starts with the main entry point
• It outputs a message to the console or screen
• The program completes successfully

Running the Example

To run this code, save it to a file with the appropriate extension for React and execute it using the command-line interface or your development environment. For example, save as hello.txt and run it.

Next Steps

Now that you've created your first React program, you can explore more advanced concepts like variables, functions, and control structures. Check out our complete React guide for more examples and tutorials.