• Python Introduction

  Python is a general-purpose interpreted, interactive, object-oriented and high-level programming language. Python was developed by Guido Van Rossum in 1989 while working at National Research Institute in the Netherlands.

Where can we use Python?

• For Desktop Application

• For Web Application

• For Database Application

• For Network Programming

• Machine Learning etc.,

• Python Installation

  How To Install Python on Windows?

  1. Visit the Python official website https://www.python.org/downloads/

     

  2. Click on the Download Python button. It will download the .exe file on your machine.

  3. Click on the executable file and install Python.

  4. Once the installation is finished check whether Python is installed or not by typing this command: python --version

How To Install Python on Ubuntu?

1. Update the os.

sudo apt update

2. Download the latest Python version

sudo apt install python3

3. Now check Python Version

python3 --version

• Python Variables

  Variable means storing a value on a reserved memory location.

  How to declare a variable?

  e.g.

  a=5 <= Declare a variable here the value is in integer form

  print(a) <=print is an inbuilt function in Python to give output.

• Python Data Types

Datatype represents the type of data present inside a variable. Python contains the following data types:

1. Numbers (int, float, complex)

   a. int: int represents the whole number.

   e.g. a=10 <= Integer value

   print(a) <= It will print output

   print(type(a)) <= It will show the type of variable

   

   b. float: It is used to represent values in decimal values.

   e.g. b=2.545 <= Floating value

   print(b) <= It will print output

   print(type(b)) <= It will show the type of variable

   

   c. Complex:

   e.g. c=4+7j <= 4 is a Real part and 7j is a imaginary part.

   print(c) <= It will print output

   print(type(c)) <= It will show the type of variable

   

2. String

   The string represents a sequence of characters closed with double quotes(") or single quotes(').

   e.g. name="ABC" or name1='ABC'

   print(name)

   print(name,type(name))

   print(name1,type(name1))

   

   

3. Boolean

   This data type is used to represent boolean values in True or False. Only True and False value is allowed for this data type. Do not use double quotes (") or single quotes (') before and after.

   e.g. a=True or b=False

   print(a,type(a))

   print(b,type(b))

   

   

4. Data conversion

   In Python data conversion is possible.

   e.g. num1=10

   num2=float(num1)

   print(num2)

   

5. Sequenced Data type (list, Tuple, Range, data dictionary, set)

   a.list:

   The list is an ordered collection of data with elements separated by a comma and enclosed within square brackets. lists are mutable and can be edited after creation.

   e.g.

    list_data=[1,2,3.5,[-4,5.6],["git","docker"]]
    print(list_data)
   

   

   b.Tuple

   A Tuple is an ordered collection of data with elements separated by a comma and enclosed within Parenthesis. Tuples are immutable and can be edited after creation.

    tuple1=(("one","Two"),("Three","Four"))
    print(tuple1)
   

   

   c.Range

   It returns a sequence of numbers that is specified by the user. If it is not specified by the user then it will start with 0 and increment it by 1.

    seq1=range(10)
    print(seq1)
   

   

   d.data dictionary:

   It is an ordered collection of data in a Key: value pair. Key: value pair enclosed with curly braces {}.

    dictname={"server":"webserver","provider":"AWS"}
    print(dictname)
   

   

   e.set:

   It is an unordered collection of elements in which no elements are repeated and they store multiple values in a single variable.

    setnm={1,"hello",3.4,True,False,9,8}
    print(setnm)
   

   

   Thank you for reading this blog.Happy Learning!!!!!

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