new create react app

1RUN IN CMD
2
3npm install -g create-react-app

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

1npx create-react-app my-app
2cd my-app
3npm start
4//Note:npx on the first line is not a typo — 
5//it’s a package runner tool that comes with npm 5.2+.

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

1create-react-app currency-converter