Python-1

What is Python?

Python is a popular programming language. It was created by Guido van Rossum, and released in 1991.

It is used for:

Web Development (server-side),

Software development,

Mathematics,

System scripting.

What can Python do?

• Python can be used on a server to create web applications.
• Python can be used alongside software to create workflows.
• Python can connect to database systems. It can also read and modify files.
• Python can be used to handle big data and perform complex mathematics.
• Python can be used for rapid prototyping, or for production-ready software development.
  
  

Why Python?

• Python works on different platforms (Windows, Mac, Linux, Raspberry Pi, etc).
• Python has a simple syntax similar to the English language.
• Python has syntax that allows developers to write programs with fewer lines than some other programming languages.
• Python runs on an interpreter system, meaning that code can be executed as soon as it is written

Software Installation

First Method Install Visual Studio  

https://code.visualstudio.com/

Then Go to the Extensions., and Then Type Python

Next Install Jupyter NoteBook Extension

Second Method: Go to the URL 

https://www.python.org/downloads/

Note:

Python is an interpreted programming language, this means that as a developer you write Python (.py) files in a text editor and then put those files into the python interpreter to be executed.

Basic Example of Python

Go to Visual Studio Code

File--> New File-

Let us print some sample text 

Python Version

To check the Python version of the editor, you can find it by importing the sys module:

Intro to Python - Syntax

Indentation: Indentation refers to the spaces at the beginning of a code line.

We should be using either space or tab while using functions, loops and conditional statements.

In other programming languages we use the Curley braces, which indicates that is a block of code. Where as in the Python we use space or tab

If the indentation is skip, we will get Error

Variables:

Python variables doesn’t need to be embedded with datatype at beginning as python has that capacity to capture the datatype based on the value assigned.

Example: a=10

In above example a is variable, python will assign this variable as int datatype. A is the variable.

Assigning multiple values at the same time.

x,y,z=1,2,3 #This assigns x=1, y=2 and z=3

Variables do not need to be declared with any particular type, and can even change type after they have been set.