angular use bootstrap 4 code example

Example 1: installing bootstrap in angular 9

ng add @ng-bootstrap/ng-bootstrap

Example 2: installing bootstrap in angular 9

....      "styles": [        "node_modules/bootstrap/dist/css/bootstrap.min.css",        "src/styles.css"      ],      "scripts": [          "node_modules/jquery/dist/jquery.min.js",          "node_modules/bootstrap/dist/js/bootstrap.min.js"      ].....