install packgae globally using yarn code example

Example 1: yarn add global

yarn global  [--prefix]

Example 2: yarn react install

There are two ways where you can initiate a REACT app.. 
1. Using npm : npm init react-app 
	 example : npm init react-app sampleApp
2. Using yarn : yarn create react-app 
	 example : yarn create react-app sampleApp