1_Programming

1_Programming

1. Algorithms

   • Solving problem 1 step at a time
   • Processors can only process 1 instruction at a time
   • Mainly expressed as a flowchart
     • Symbols
   • Pseudocode
     • Should allow a programmer to write it in any language
     • Used for planning algorithms
     • Key words written in capital letters (Eg Input)

2. High Level / Low Level programming

   • High Level has to be translated
     • uses language that is easier to understand by humans
       • eg Python
   • Low level is understood 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

3. Translation

   • Assembler
     • Only can be used in low level programming
     • Turns assembly language into machine code
   • Compiler
     • Creates an executable file to run the program
     • Once its compiled it doesn't need the original source code
       • Used for proprietary software

4. Control Flow

   • Selection
   • Sequencing
   • Iteration
   • The order through an algorithm

5. Datatypes

   • variable
     • Changes during the program
   • Contant
     • Stays the same
   • Arrays are lists of the same data types
   • Integers and real numbers
     • integers are whole numbers
   • Operators
     • Mathematical symbols

6. Testing

   • Logical error
     • Human error in contruction of program
   • Syntax error
     • No a correct command for the coding language
   • Run-time error
     • An error stuck in a loop