how to apply bootstrap in angular code example

Example 1: how to add bootstrap in angular

@import "~bootstrap/dist/css/bootstrap.css"

 "styles": [
              "./node_modules/bootstrap/dist/css/bootstrap.css",
              "src/styles.css"              
            ],

Example 2: install bootstrap in angular

$ npm install bootstrap

Example 3: adding bootstrap to angular

$ npm install --save bootstrap

Example 4: angular add bootstrap

npm install bootstrap