Programming Language

Programming Language

1. Machine code

   • Machine code is like a translator for the CPU
     • Other codes are transfered into Machine code so they can be exectuted by the CPU
       • Translation carried out by
         • Compilers
         • Or assemblers
   • Operation Code
     • What to do to the data
   • Memory Address
     • Where from data is read/wrote
   • One high level command can translate into many individual machine instructions
   • Understandable by computers

2. High level language (source code)

   • Syntax
     • Rules for the use keywords
   • Written so it can be understood by humans
     • Keywords
       • IF
       • SORT
       • FUNCTION
   • Made up of instructions written in high level languages
     • Visual Basic
     • C++
     • Delphi
     • Java
   • Written in words
   • Understood by humans

3. Assembly Language

   • Low level program language
     • Understandable by computers
   • Made up of small set of command words
     • These are called MNEMONICS
       • MOV
       • ADD
       • LDA

4. Complier

   • Executable file exe
   • Fully developed and tested
   • Standalone file
   • Source code converted into Machene code

5. Interpreter

   • Translate the source code one line at time
   • It can only be used in the interpreter software
   • One line at a time

6. Opcode

   • are the instructions told to the processor example add, subtract
   • Add

7. Operand

   • Value/data
   • value needed for an operation
   • 20