which version of bootstrap can i use to angular 8 code example

Example 1: installing bootstrap in angular 9

ng add @ng-bootstrap/ng-bootstrap

Example 2: install bootstrap angular 9

From angular cli:

npm install --save bootstrap
npm install --save jquery

Then add the following paths to angular.json:

"node_modules/bootstrap/dist/css/bootstrap.css" in the projects -> architect -> build -> styles array
"node_modules/jquery/dist/jquery.js" in the projects -> architect -> build -> scripts array
"node_modules/bootstrap/dist/js/bootstrap.js" in the projects -> architect -> build -> scripts array