Introduction to numpy and scipy ,-properties :- Size ,shape ,ndim,dtype

Answer 1

Num put is a library
Wich manually a python had it and it didn't need instal
As it name
It is realy use full for numerical works
Idont know more but
You can use
import numpy
help(numpy)
To see a manual of using it

Answer 2

Please follow me and have a look at my full calculator code