Installing numpy (#463)

* Updated List of sections

* Updated index.md

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* Added installing numpy.md file and updated the index.md

* Added installing-numpy.md file and updated the index.md

* Create installing-numpy.md for installation

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* Update index.md

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Co-authored-by: Ankit Mahato <ankmahato@gmail.com>

contrib/numpy/index.md

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 # List of sections
 
+- [Installing NumPy](installing-numpy.md)
 - [Introduction](introduction.md)

contrib/numpy/installing-numpy.md

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+# Installing NumPy
+
+NumPy is the fundamental package for scientific computing in Python.
+NumPy is used for working with arrays. 
+
+The only prerequisite for installing NumPy is Python itself.
+#
+**Step 1: Check if PIP is Installed**
+
+Before installing NumPy, it's essential to ensure that PIP (Python Package Installer) is installed on your system. PIP is a package management system used to install and manage Python packages. You can verify if PIP is installed by running a simple command in your terminal or command prompt. 
+
+```bash
+pip --version
+```
+
+If PIP is not currently installed on your system, you can install it by visiting the [pypi.org](https://pypi.org/project/pip/) webpage. 
+
+#
+
+**Step 2: Installing PIP**
+
+**get-pip.py**
+
+This is a Python script that uses some bootstrapping logic to install pip.
+
+Open a terminal / command prompt and run:
+
+**Linux**
+```bash
+python get-pip.py
+```
+
+**Windows**
+```bash
+py get-pip.py
+```
+
+**MacOS**
+```bash
+python get-pip.py
+```
+
+#
+
+**Step 3: Installing NumPy**
+
+NumPy can be installed either through conda or pip.
+
+If you use pip, you can install NumPy with:
+
+```bash
+pip install numpy
+```
+
+If you use conda, you can install NumPy from the defaults or conda-forge channels:
+
+```
+# Best practice, use an environment rather than install in the base env
+conda create -n my-env
+conda activate my-env
+```
+
+```
+# If you want to install from conda-forge
+conda config --env --add channels conda-forge
+```
+
+```
+# The actual install command
+conda install numpy
+```
+
+You can find more information about how to install [NumPy](https://numpy.org/install/) on numpy.org.
+
+#
+
+**Step 4: Check if NumPy is Installed**
+
+We can utilize the "pip show" command not only to display the version but also to determine whether NumPy is installed on the system.
+```bash
+pip show numpy
+```