2.2 programming techniques

2.2 programming techniques

1. variables and constants

   • variable - a value stored in memory location that can change within a program
   • constant - a value stored in memory location that never changes
   • sequence - completing steps in the order they must be completed in
   • selection - where a choice is made in a program depending on the condition or outcome
   • iteration - act of repeating or looping specific sections of a code.
     • count controlled iteration - repeats a set number of times
     • condition controlled - repeats until the condition is met or something in the program changes
   • syntax error - an error in the rules/grammar language e.g. missing colon or capital letter
     • logic error - the program is written to do something other than what the program is intended
     • run time error - more difficult to spot as the program continues to run

2. data types

   • real/float - number with a decimal
   • integer - number without a decimal point
   • string - a series of characters /TEXT
   • characters - a single letter or symbol
   • date/time - date and time in any format
   • boolean - yes, no ,true, false value

3. #comments are used to explain parts of your code

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