Design & Technology Grade 7 Python Python Introduction

Input Date Processing Out Put Information Program Editor Compiler Problem Programmer Algorithm flowchart Program Editor Compiler Real Program Run Input Date Processing Out Put Information

Python is a programming Language Python = Program (Script ) is list of instructions or statements Statement = Syntax (Format ) Syntax = Spelling & Grammar

Displaying String Output String output: A message appears onscreen that consists of a series of text characters. Print statement ( syntax ) Format: print ("the message that you wish to appear")

Print (“I love “ + “ Python “) The Print Statement To Display output Print ( constant ) Print (“ string “ ) Print (Expression ) Print ( Mixed ) Print ( variable ) Print (5) Print (“Python”) Print ( 5+6) Print (“I love “ + “ Python “) Print (5, “ICT”,1+2)

Arithmetic Operators Operator Description Example = Assignment num = 7 + Addition num = 2 + 2 - Subtraction num = 6 - 4 * Multiplication num = 5 * 4 / Division num = 25 / 5 % Modulo num = 8 % 3 ** Exponent num = 9 ** 2 num = 9//2 divide //

Parenthesis ( ) Power ** Multiplication * , / Addition + , - Order Of Operation Parenthesis ( ) Power ** Multiplication * , / Addition + , - Left to Right

Variables Format: Examples: Num = 5 X =2.3 Firstname = “Basma” <name of variable> = <Information to be stored in the variable> Examples: Num = 5 X =2.3 Firstname = “Basma”

Variables Naming Must start with a letter Case Sensitive Can’t be Python Key word Prefer Meaningful capitalizing the first letter of each word

Variables Naming Myage = 5 FirstName =“Basma” HourWork=8 RateperHour=50 Side_Squar=10

Input Statement The computer program getting string information from the user. Strings cannot be used for calculations (information getting numeric input will provided shortly). Format: <variable name> = input("<Prompting message>") Example: name = input ("What is your name: ") Print ( name )

Converting Between Different Types Of Information (2) Example motivation: you may want numerical information to be stored as a string (for the formatting capabilities) but also you want that same information in numerical form (in order to perform calculations). Some of the conversion mechanisms available in Python: Format: int (<value to convert>) float (<value to convert>) str (<value to convert>) Examples: Program name: convert1.py x = 10.9 y = int (x) print (x, y)