High level and low level programming languages

High level and low level programming languages

1. High level language

   • Editor
     • It will colour code key words in high level coding languages.
     • Allows the user to edit and change code.
   • Syntax checker
     • Syntax checker goes through the code searching for syntax errors and highlights them.
     • Syntax checker suggest how to fix syntax errors.

2. Assembly Language

   • Assembly language is made up of command words called mnemomics
     • Examples of mnemomics
       • MOV commands moves data from one location to another
       • ADD command carries out an add operation

3. Machine code

   • Made up of 'operation code' and 'memory address'
     • Operation code is the part of machine code that specifies what to do with the data.
     • Memory address is the part of the code where the data is read from and written to.
   • The CPU can only understand machine code, all other coding languages have to be translated into machine code
     • The data is translated by programs called compilers or assemblers
   • machine code is specific to the CPU.

4. Compiler

   • Converts the source code into machine code so that it can be executed as a stand alone program file. It converts the code in one go.

5. Translator

   • Converts high level code into low level code.

6. Interpreter

   • Converts the source code into machine code so that it can be executed as a stand alone program file. It converts the code line by line.

7. Opcode

   • Opcode tells the processor the job that needs to be done such as add or subtract.

8. Operand

   • Operand stores the values that are going to be acted on.