What is python

[N.B: Please, don’t be worry if you don’t understand anything of this chapter. We will discuss everything gradually in this book]

v  Feature of Python:

Ø  An interpreted, interactive, object-oriented programming language

Ø  Supports object oriented programming, structured programming and also functional programming

Ø  Incorporates:

·         Modules

·         Exceptions

·         dynamic typing

·         very high level dynamic data types

·         classes

Ø  Very clear syntax

Ø   Interfaces to many system calls and libraries

Ø  Extensible in C or C++

Ø  Open source

Ø  Very stable

Ø  Compatible with Major Platforms and Systems

Ø  Robust standard library

Ø  Helps to access database easily

v  Why the name Python:

Guido van Rossum is the author of the python programming language. He was thinking about a short, unique and mysterious name for his language. In that time he was also reading a BBC comedy series named “Monty Python’s Flying Circus”. So, he decided to call his language as python.

v  Application of Python:

Ø  Web and Internet Development

Ø  Scientific and Numeric computing

Ø  Software development

Ø  Used to build ERP and e-commerce system

Ø  Artificial intelligence

Ø  Game development

Ø  Desktop application

Ø  Web crawling

Ø  GUI application etc.

v  Variable declaration:

 #  variable declaration

 variable_name = value

v  How to take input:

# How to take input

variable_name = input() # variable_name is str type

v  How to show output:

# How to show output

print('what you want to show as output')

v  Syntax of Conditional statement:

# Conditional Statement

if condition:
    # put your statement here
elif condition: # if you have multiple conditions then use elif
    # put your statement here
# you can use more elif condition as your need
else:
    # put your statement here

v  Syntax of Loop statement:

Ø  for Loop:

# for Loop Statement

for iteration in variable:

    # put your statement here

 Ø  while Loop:

# while Loop Statement

while condition:

    # put your statement here

v  Function statement:

# function statement

def function_name(parameters):

    # put your statement here

    return result

v  Lambda function:

# lambda statement

output = lambda input1,input2,input3: # put your statement here