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1. Programming Fundamentals

   • Variables
     • Variables and Constants are both named locations in memory
     • They are used to store tempoary values that can change as the program is run.
     • Variables sometimes need to be declared before they can be used this is called a variable declaration
     • Choosing a sensible identifier is easy for example player_name is more simple to understand that x_Mary because x could mean anything. Doing it this way mean its easier to understand and to fix if their are some errors in it.
       • Their are rules to choose a good identifier such as: cannot include spaces,can only contain letters numbers and underscore symbols you cannot used words such as 'if' or 'else' , they are case sensitive and they should be quite short to make it clear and understandable.
   • Constants
     • Constants and variables are both named locations in memory
     • Used to store values that do not change throughout the programs execution