1npx create-react-app my-app
2cd my-app
3npm start

1npx create-react-app project-name

1npx create-react-app my-app
2cd my-app
3yarn start

1npx --ignore-existing create-react-app .

1npm install -g create-react-app
2create-react-app react-app
3cd my-app
4npm start

1//open terminal and run this code
2create-react-app newreact
3//it will install all the packages