Python and PIP

[scratchmyhead]

I downloaded and installed python 3.7 version and have been running Pycharm with no problem but when I go to the command prompt and check the python version and pip version, it doesn't show any one of the two installed. It gives me an error. It wont give me the version number. I type the following in the command prompt:

pip --version

So when I type this in, i get an error message basically saying it doesn't recognize pip.

Could anyone tell me what exactly is going on? Thanks.