React Native

React Native is like React, but it uses native components instead of web components as building blocks. So to understand the basic structure of a React Native app, you need to understand some of the basic React concepts, like JSX, components, state, and props. 

Create React Native App is the easiest way to start building a new React Native application. It allows you to start a project without installing or configuring any tools to build native code - no Xcode or Android Studio installation required

Required software

• Android Studio (IDE) 

• Android SDK

• Java

• Node Js

• NPM

• React native cli

• Xcode (Create ios application)

Project Structure 

project name 
     android         // Android code
     ios             // IOS Code
     node_modules    // npm packages
     .babelrc        // .babelrc file
     .buckconfig     // .buckconfig file
     .flowconfig     // .flowconfig file
     .gitattributes  // .gitattributes file
     .gitignore      // .gitignore file
     .watchmanconfig // .watchmanconfig file
     App.js          // App.js file
     app.json        // app.json file
     index.js        // index file
     package.json    // package file
     yarn.lock       // yarn file

Installing Command 

After installing required software  open terminal/cmd and run command step by step

Sudo npm install -g react-native-cli

Create starter application

Create default application by using the react native CLI (Command Line Interface):

react-native init 

Serve Browser

After creating the project then run this command to serve application browser:

cd  
react-native start

Run Application emulate/device

Once you have dependencies installed you are ready to run or emulate/device the application:

react-native run-android // run android device
react-native run-ios // run ios device

This step Follow to create a hybrid application using the react native.

Thanks :)