This document provides an overview of the Python programming language. It describes what Python is, how it can be used for web development, software development, mathematics, and system scripting. It also covers Python's syntax features like indentation, variables, comments, and data types. Key reasons for using Python include its ability to run on different platforms, simple English-like syntax, and support for procedural, object-oriented, and functional programming.

1. PYTHON TUTORIAL
By: SURBHI SAROHA

2. 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.

3. 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.

4. 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.
This means that prototyping can be very quick.
 Python can be treated in a procedural way, an
object-oriented way or a functional way.

5. Python Indentation
 Indentation refers to the spaces at the
beginning of a code line.
 Where in other programming languages the
indentation in code is for readability only, the
indentation in Python is very important.
 Python uses indentation to indicate a block of
code.
 Example
 if 5 > 2:
print("Five is greater than two!")

6. Cont….
 Python will give you an error if you skip the
indentation:
 Example
 Syntax Error:
 if 5 > 2:
print("Five is greater than two!")

7. Python Variables
 In Python, variables are created when you
assign a value to it:
 Example
 Variables in Python:
 x = 5
y = "Hello, World!“
 Python has no command for declaring a
variable.

8. Comments
 Python has commenting capability for the
purpose of in-code documentation.
 Comments start with a #, and Python will
render the rest of the line as a comment:
 Example
 Comments in Python:
 #This is a comment.
print("Hello, World!")

9. Multi Line Comments
 Python does not really have a syntax for multi
line comments.
 To add a multiline comment you could insert
a # for each line:
 Example
 #This is a comment
#written in
#more than just one line
print("Hello, World!")

10. Cont…
 Or, not quite as intended, you can use a multiline
string.
 Since Python will ignore string literals that are not
assigned to a variable, you can add a multiline
string (triple quotes) in your code, and place your
comment inside it:
 Example
 """
This is a comment
written in
more than just one line
"""
print("Hello, World!")

11. Single or Double Quotes?
 String variables can be declared either by
using single or double quotes:
 Example
 x = "John"
# is the same as
x = 'John'

12. Case-Sensitive
 Variable names are case-sensitive.
 Example
 This will create two variables:
 a = 4
A = "Sally"
#A will not overwrite a

13. Variable Names
 A variable can have a short name (like x and y) or a more descriptive name
(age, carname, total_volume). Rules for Python variables:A variable name
must start with a letter or the underscore character
 A variable name cannot start with a number
 A variable name can only contain alpha-numeric characters and
underscores (A-z, 0-9, and _ )
 Variable names are case-sensitive (age, Age and AGE are three different
variables)
 Example
 Legal variable names:
 myvar = "John"
my_var = "John"
_my_var = "John"
myVar = "John"
MYVAR = "John"
myvar2 = "John"

14. Program
 x = "awesome"
 def myfunc():
 x = "fantastic"
 print("Python is " + x)
 myfunc()
 print("Python is " + x)

15. OUTPUT
 Python is fantastic
Python is awesome

16. THANK YOU 