Basics Of Python

Firstly we learned about Python, like the history of Python and which types of applications are created with Python. Now, we will discuss the history of the Python programming language. Python was designed by “Guido Van Rossum” at CWI (center for wisdom and informatics) located in Netherland. In python, we create windows and web-based applications. Python

Note: Sometimes we can say Python is a scripting language and very easy to write a program in python Python is dynamically typed, which means the data types can be defined at the time of execution of the program. Example

Value=2; And value=’Ajay’; (Show in the picture below) Interactive Execution of Expression

Python programming language allows users to do words just like a calculator, you type an expression and python executes the expression immediately (within seconds). Let’s go and check how it works. Open python(command line) application shown in the picture below, After launching application type expression for execution >>>2+3 5 // this is the result of expression 2+3 (Shown in picture) Key: Three right arrows (>>>) are the expression prompt telling python system is waiting for your expression You can see the result of your expression, after pressing enter/return. We can perform all arithmetic operations (shown in the figure). Comments

• Integer stores any non-fractional number counting.
• Python does not upper boundary on the size of integer
• Size is also dependant on the number
• Example: the size of 5 is 12 bytes on the 32-bit operating system.
  Size of 9999999 is 20 bytes on the 32-bit operating system.
• An integer can be positive and negative both

Floating (float)

• Float stores any fractional number.
• Python does not upper bound on the size of the float.
• Size of the float also depends on the number
• Python used scientific notation for float numbers.
  1.2e3 means 1200.0

String

• String stores characters or sentence
• Python does not upper bound on the size of the string
• Size of string also depends on the length of string

Boolean

• Boolean type represents a true or false value

Example

>>>15 < 21

True >>> 2 > 5

False Variables

Variables are just the name of a data type but reserved memory locations to store values for the different data types. This means that when you create a variable you reserve some space in memory. Size of reserve memory depends on the data type of variable Python allows you to assign a more than one variable at a time Example: A=b=c=d=10; Operators Operators are the constructs which can manipulate the value of operands Types of Operator

Python supports the following type of operator lists below,

Arithmetic Operators

they are the following listed table. b % a = 0

Comparison Operators assume a=10 and b=20

Logical operator

assume a=10 and b=20

Bitwise Operators bitwise operator work on bits. assume a=60 and b=13 binary of a and b are a=0011 1100 b=0000 1101

Print statement

print something on the screen in python we use. print function example(shown in picture) print'c# corner'. Input from the user. (shown in picture)

Read more articles on Python:

• Python Language Tutorial Part - 4
• Python Functions Overview