Python Basics- Lesson 1

Congratulations and Welcome to class X  👍

This is our first e-class ( both for you, as a student and me, as a teacher). 😎
What a nice way to begin  Computer Applications. 

Lets take a review of the Basics of Python learnt in class IX . A firm 💪💪 understanding of the basics will help create a programmer in you.  

By the end of this session, we would be able to identify the basic elements of a python program.

Please take down the above details shared neatly in your CA register. Let it be presented in the same way as it appears on the blog. Your handwriting must be neat.
                                                       
Python is 

• Widely used
• interpreted (An interpreter converts the source code to machine code)
• object oriented
• High level programming language( Closer to the human beings)
• created by Guido Van Rossum 
• released on February 20,1991

Key Features

1. Simple- Written in simple English statements. Therefore, it is easy to understand the syntax( way of writing)
2. Easy to learn- structure of program is very simple and easy to create. 
3. Platform independent and portable- Python can work on any Operating System.
4. Open Source- It is available free and can be downloaded free from www.python.org 
5. Dynamically typed- There is no need to define the type(int or float) of the variable. It is automatically defined based on the use.
6. Huge Library-It has large inbuilt library which is pre-built and is capable of being portable.
7. Procedure and Object oriented- The programs can be built using features like functions, procedures, classes and objects also.

IMPORTANT TERMS

1. TOKENS- 

• They are the smallest unit of a program. 
• Characters are translated into a sequence of tokens.
•  There are following tokens in Python:

• keywords
• literals
• identifiers
• operators
• punctuators

2. Keywords-

• These are special words which are reserved by Python .
• They have specific meaning.
• We are not allowed to use keywords as variables in Python. 
• Keywords are case-sensitive.

3. Identifiers-

• These are user-defined names to represent entities like variables, functions etc.
• We have rules to follow in order to create valid identifiers

     4. Literals- 

•  These are the data that is given to a variable or a constant.A constant does not change while a variable gets its name from the fact that its value can change.
• The various types of literals are
• Strings
• Numeric
• Boolean
• Special

    5. Operators- 

• Operators are  the symbols which perform the operation on some values.(Eg- in a+b, "+" is an operator) 
• Values are known as operands.(Eg.- in a+b, a an b are operands)
• types of operators:
• unary-operator acts on single variable 
• binary-operator acts on two variables
• tertiary- operator acts on three variables

6. Punctuators- These are symbols that are used in programming languages to organize sentence structures

After having taken a tour of the basics, lets test our understanding with the following online form:

Click here : 👇

Lets take an online test ( Give yourself only 5 minutes to fill the response)

NOTE- You can view the content of the blog after the class is over also