Compilers and Interpreters in Computer


  • Besides the application software and the system software, there is a third kind of software called the compiler software.
  • Compiler is a system program that translates source code (user written program) into object code (binary form).
  • The whole source code file is compiled in one go and a complete.
  • This means that the program can only be executed once the translation is complete.
  • It is 5-25 times faster than an interpreter.
  • Ex- C & C++ are most popular compiled language.


Translate the high level language and execute the instruction before passing on to the next instruction.

  • An Interpreter is contrast to a compiler, analyzes & executes the source code line- by – line without looking at the entire program.
  • First it translates & executes the first line then it moves to the next line of the source code & repeats the process.
  • It is a slow process.
  • It is used in FORTRAN program.
  • Ex- JavaScript & VBScript are interpreted language.


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