Computing python

• Python

  • a high level programming language which is open source
• IDLE stand for

  • Intergrated development learning environment
• Syntax

  • rules that control the structure of the symbols of a programming language
• Variable

  • has data type which defines the format of the variable
• Constant

  • a named data store thans a value that doesnt change during the executions of a program
• a=b=18

  • asiigning the same value to multiple variables
• int=integer

  bool=boolean

  eval/float=real
• Python is case sensitive
• the file extension all files created in python are .py
• a program whose source code is made available for use or modification by users or others is called open source
• Arithmetic Operators:

  • Python uses arithmetic operators to perform calculations
  • Operator: +

  Action: Add

  • Operator: -

  Action: Subtract

  • Operator: *

  Action: Multiply

  • Operator: /

  Action: Divide

  • Operator: ^

  Action: Raise to the power of
• radius=eval(input("enter the radius :"))area=3.14*radius*radiusprint("The area of the circle is ", area)
• Rules that must be followed when naming variables

  1. a variable can consist of digits & letters
  2. a variable name cannot have a space in it
  3. a variable can start with a letter or and underscore but not with a digit
  4. keywords are not allowed when naming a variable eg def or while
  5. python is case sensitive
• Types of data types in python

  1. string
  2. integer
  3. boolean
  4. floats
• 1. The symbol used to comment in Python is this symbol: #