Problem Solving using C Language

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Introduction to Computers

Interpreter, Compiler and Assembler

Assembler:

  • An assembler is a tool that translates assembly language, which is a low-level human-readable language, into machine code. Assembly language consists of mnemonics that correspond directly to machine instructions, so the assembler’s job is to convert these mnemonics into binary code that the computer’s processor can execute.
  • Use Case: Assemblers are used in system programming, embedded systems, and situations requiring direct hardware control.

Interpreter:

  • An interpreter is a program that executes instructions written in a high-level programming language. Instead of converting the entire program into machine code at once, the interpreter reads the program line by line, interpreting and executing each command immediately.
  • Use Case: Interpreters are useful during the development process as they allow for immediate execution and debugging of code without the need for compilation.

Compiler:

  • A compiler is a tool that translates high-level programming language code into machine code or an intermediate code in one go, creating an executable file that can be run later without the need for the source code. Unlike interpreters, compilers do not execute the code during the translation process.
  • Use Case: Compilers are ideal for production environments where performance is critical, as compiled code generally runs faster than interpreted code.

Difference Between Assembler, Interpreter, and Compiler

FeatureAssemblerInterpreterCompiler
Translation MethodConverts assembly code to machine codeConverts high-level code to machine code line by lineConverts the entire high-level code to machine code at once
ExecutionGenerates executable machine codeExecutes code directlyGenerates an executable file
Speed of ExecutionFast (machine code runs directly)Slower (interprets line by line)Fast (after compilation)
Error DetectionDetects errors in assembly codeDetects errors line by line during executionDetects errors after full compilation
StorageRequires storage for machine codeDoes not store machine codeRequires storage for compiled code
Use CaseSystem programming, embedded systemsScripting, dynamic environmentsProduction-level applications, high-performance scenarios
Example LanguagesAssembly LanguagePython, RubyC, C++, Java
Assembler, Interpreter, and Compiler