PROGRAMMING BASICS

PROGRAMMING BASICS

1. VARIABLES

   • points to are of memory that stores data, can be changed while program executing
   • constant - value that cannot be altered by the program during execution
     • pi = 3.14
   • casting
     • changing from one variabe type to another
       • int(input("Enter the price"))

2. DATA TYPES

   • string
     • sequence of characters, can be numbers, letters, symbols, must be in speech marks
     • input("Enter your name")
     • python = str()
   • integer
     • a whole number, positive or negative
     • 45, 324 ...
     • python = int()
   • boolean
     • two possible values, TRUE or FALSE
     • 35 > = 5 * 7
       • TRUE
     • 2 ^3 = 10
       • FALSE
   • float
     • a decimal number, real value
     • 3.14, 5.01 ...
     • python = float()
   • character
     • A single alphabetic or numeric character
     • ‘K’, ‘4’, ‘@’, ‘%’

3. MATH OPERATORS

   • add +
   • - minus
   • * mulitple
   • / division
   • // displays whole number in divison
     • 5 // 2 = 2
   • % displays remainder in divsion
     • 5 % 2 = 1
   • ^ power to (indices)
   • == equal to != not equal to < Greater than > Less than
   • <= less than/equal to >= more than/equal to

4. PSEUDOCODE

   • algorithm
     • series of steps to solve problem/carry out task
   • structured English for describing algorithms
   • if total == 19 : print ("You won")