A bit off topic but essential

I hope many of you know about jupyter notebook.
i installed it and its running fine. Even completed one whole project on it.
But the thing is my cmd (i have windows10 installed) can’t recognize jupyter command at all.
for ex - commands like - 1) where jupyter shows - " INFO: Could not find files for the given pattern(s)."
2) jupyter " insert anything here" shows - " ‘jupyter’ is not recognized as an internal or external command,
operable program or batch file."

while its installed and running perfectly.
I have already searched a lot (you can guess that by this post already). But all solutions states about installing it first then running. But here its already installed and running perfectly fine.
suggest some solutions please.

Stack overflow is the best place to ask such questions. Post the same thing and wait for response.