This is for learning purpose
How to start on Windows | Prequisite : Python should be installed on windoes
Create a directory name flask_app.
run this command 'py -m venv env'
this will create virtual env for you.
Now activate this env by executing 'env\Scripts\activate'
This will activate environment and now your directory path will have (env) as prefix.
now run 'pip install flask' . this will install flask in your system.