Steps To Create App in React Native

1. Setup environment for react native.

2. Open Terminal/command prompt in the folder you want to create app in .

3. Enter
   
   npx react-native init app_name
   
   

4. Once the app is created , Open app folder in your ide or editor (I'm using VS code).
   

5. Open App.js, there will be default code template given try running it by opening Terminal/command prompt in App Folder respectively.
   
   To run the app write
   
   npx react-native run-android
   
   
   

6. Once the App runs replace all the code in App.js with
   

import React, {Component} from 'react';  
import {Platform, StyleSheet, Text, View} from 'react-native';  


export default class App extends Component {  
  render() {  
    return (  
      <View>  
        <Text>Hello World</Text>  
      </View>  
    );  
  }  
}  

And refresh the code by pressing "R" in node terminal , don't forget to save before refreshing.

THATS IT FOR Hello World :)

Try Tinkering with the code to understand better.