Programming

• READ file.name variable_name
• Each READ in pseudocode reads a line
• WRITE file.name value
• computers perform branching instructions by transferring control to different parts of the program, depending on the result of a decision
• In all programming repsonses where code is given use line numbers, except for high mark repsonses. It is not needed there
• Abstraction is hiding unnecessary detail, generally lower level parts hidden from higher parts of a program. For example a main would likely call functions, which acts as general detail, where as the declaration is specific detail
• An abstraction layer contains inputs, outputs. Additionally it may contain variables and constants, aswell as key processes and repeated processes.
• Presence checks are done with a comparison of a variable to None, however if it is a string such as input then use quotation marks with an empty string
• Type checks are done in python using isinstance() for a boolean result, however for inputs you must use try... except... blocks
• Format checks are best done using slices and in
• Insertion sorts are very slow, however they are useful when adding an element to a sorted array
• Insertion sorts work by:

  1. Compare first element to new element
  2. Shift the unsorted element to its correct position.
  3. Advance the sorted/unsorted list marker to the right one element.