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testing (Alpha, beta and final testing (Before releasing new software on…

- - - - includes:
        
        improving names for variables and custom functions
        
        placing sections of code in locations that make it easier to read
        
        breaking large sections of code into smaller pieces with a logical flow
    - - Commenting is used to explain the function of different sections of code.
- - - - valid - the most obvious or common data that should work
      - valid extreme - unusual, extreme or unexpected data, eg the highest and lowest (data that tests the limits but that should work)
      - invalid - data that should definitely fail
      - invalid extreme - data that is at the edge of failure and is nearly acceptable
      - erroneous - data that is the wrong data type
- - - - is an individual set of instructions or steps in which the user might use the software
    - - The purpose of the acceptance test is to check that the system performs exactly as required.
    - - is used to track changes in the development of your software.