translators

• what are examples of high level language?


  Python, Java, C++
• what are the advantages of high level language?

  hardware independent

  easier for programmers to use

  designed for a specific use

  hides away processor operations
• what happens in a machine code?

  typical instructions

  holds an operation code

  in the first few bits and an oper and in the rest of the bits

  modern comouters use 32 or 64 bits for each instruction
• what does an assembler do?


  converts assembly language to machine language
• advantages of low level

  instructions can be executed directly by the CPU

  very fast to execute

  can directly access and modify data in the register
• advantages of high level

  easy to read,write and modify the code

  allows the programmer to focus on the functionality rather than how the computer works

  can be run on different hardware
• disadvantages of low level

  hardware dependent works only on specific processors

  more difficult to understand the code
• disadvantages of high level

  each language has its own specific syntax and keywords

  codes need to be translated

  slower to execute
• interpreter


  runs slowly

  starts right away

  lets you see results

  translates one line of high level code and immediately executes it
• compiler

  extra preparation time

  but the program runs very quickly

  translates every line of a high level program to machine code to produce an executable file
• when is a compiler used?

  • Creates a .exe file
  • The source code is not shared
  • The program code cannot be modified
  • Used for commercial, licensed software
• when is an interpreter used?

  -Used to develop programs or learn a programming language (easy to spot errors)
• when is an assembler used?

  Used to produce an executable file for an assembly language code