Programming

Programming

1. control FLow

   • Selection
     • IF THEN ELSE
   • lteration
     • loops
       • While or FOR
   • Quencing
     • The order through an algorithm

2. algorithms

   • solving the problem 1 step at a time
   • processors can only process one instruction at a time
   • make sure you know the symbol
   • Mainly expressed as a flow chart

3. Testing

   • Logical error
     • Human error with construction of the aigoritm
   • run-time error
     • An error in the program eg stuck in a loop
   • Syntax error
     • Not a correct command for the coding language being used.

4. data type

   • Variable or constant
     • operations are mathematical symbols eg <> + -
     • variable changes during the program eg source in a game
     • constant stays the same eg Pi
   • Arrays are lists of the same data types
   • Integers and real numbers
     • Integer is a whole number
     • Real (sometimes called float) can have decimal places

5. pseudocode

   • Used for planning algorithm
   • should allow a programmer to write it in any language
   • Key words written in capital letters (eg INPUT,IF,WHILE)

6. High level/Low level programming

   • Low level is understand by the processor
     • Machine code
       • binary codes for each instruction and register location
     • Assembly language
       • Codes specific to a type of processor
         • eg INP, LDA out
   • HIgh level has to be translated
     • eg python Basic javascript
     • Has to be translated
     • uses language that is easier to understand by huumans

7. translation

   • interpreter
     • can be only in use in own programing
     • would be use in open source software
     • Executes the source code directly
   • Assembler
     • Turns accembly language into machine code
   • complier
     • would be use for proprietary software
     • once its is complied it doesn't need original source code.
     • create an executable file to run the program