download react native documentaton code example
Example 1: react native docs
https://reactnative.dev/docs/getting-started
https://devdocs.io/react_native/
Example 2: get started with react native
//get started with react native app for android on macOS
brew install node
brew install watchman
brew cask install adoptopenjdk/openjdk/adoptopenjdk8
//add the following to ~/.bash_profile & ~/.zshrc
export ANDROID_HOME=$HOME/Users/junglesoft/Library/Android/sdk
export PATH=$PATH:$ANDROID_HOME/emulator
export PATH=$PATH:$ANDROID_HOME/tools
export PATH=$PATH:$ANDROID_HOME/tools/bin
export PATH=$PATH:$ANDROID_HOME/platform-tools
//add the following to local.properties file at android/app level
sdk.dir=/Users/junglesoft/Library/Android/sdk
//launch app
npx react-native init ProjectName
//run on virtual android
npx react-native run-android