How Python Code is Run

• python code is executed from the top to the bottom of the program
• if an error is detected: the program will be executed up until the point where the error takes place
  • other programming language: if there is an error, the code cannot be run at all

Variables

a = 1 
b = "hello"

Basic Data Types

• string

  a = 'Hello' 
  print(a)
  b = a*2
  

• numbers:

  • int
  • float

Basic operations

• **
• / and // and /%

Boolean, If-Else

• boolean

• comparisons in python:

  1 == 1 
  
  1 == '1'
  
  1 is '1'
  
  1 != 1
  

More data types

• lists