[Python] Unable to install modules in python 3.12.6 through command prompt

I have installed Python 3.12.6 with idle Python, Python, Python module docs. All 64bit versions are in version 3.12 respectively but I can not seem to install modules.

I did this in the command prompt:

C:\Users\my user name>pip3 -v
'pip3' is not recognized as an internal or external command,
operable program or batch file.

C:\Users\my user name>pip3 install numpy
'pip3' is not recognized as an internal or external command,
operable program or batch file.


and that happened I tried typing the same stuff in Python and used pip as well and it did not work.

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