programming

programming

1. python

   • strings
     • they represent uncoded characters
     • print("hello")
   • variables
     • a location that stores temperary information
     • e.g a"..."
       • each letter is a number, counting up from 0
         • a="hello" h=0 e=1 l=2 l=3 o=4
           • print(a[4]) means o
           • print(a[1:3]) means ell
     • print=()
       • no speech marks
   • print ("...")
     • ""is very important;without it there is a sintax error
       • if this happens then you have to debug your code
   • used to give instructions
     • used in many ways
   • underscore
   • comments
     • starts with a #
     • allows a programmer to understand the programming
   • functions
     • appear in purple
     • print()
     • input()
       • must put letters
         • string= two letters or more
   • array
     • a list

2. solving problems

   • order of instructions
     • decomposition
       • when a problem is brocken down into simpler steps
     • algorithm
       • the different steps to solve a problem
       • used in all types of programming
       • sequence
         • the order in which a computer solves a problem