Differences

Difference between Compiler and Interpreter

Main Difference between Compiler and Interpreter

Both the compiler and the interpreter translate higher-level language programs, the difference is that a compiler compiles the source code into executable machine code while an interpreter interprets each instruction and executes it without producing any machine / object code. . Compiler work is done only once, after a program is compiled; it can be saved for later execution, while the interpreter must interpret each time the program is executed. Object code is generated in the compiler case, while no object code is produced in the interpreter; only produce intermediate code. The compiler processes the entire program, but an interpreter processes it instruction by instruction. In the compiler, the execution of the program is fast and in the case of the interpreter it is slower because the interpretation and execution declaration by declaration is time consuming. In the compiler, the debugging process is difficult compared to debugging in an interpreter. The compiler does not require source code at run time, but in the case of the interpreter, a complete source code file is required to run a program. The compiler requires more memory because the generating machine code is quite large, but in the case of the interpreter, no additional memory is needed. In compilers, a program’s errors are displayed after parsing the full source code, but in the In the case of the interpreter, errors are displayed for each line interpreted. The compiled code is executed by the computer hardware in the case of compilers while in the interpreters, the intermediate code is processed by another program. In the programming scenario, the compiler checks the syntax of the program, but the interpreters check the keywords of a program. In compilers there is scope for code optimization and interpreters allow code modification at run time. Both are used by programmers and both have their own specifications and advantages. In compilers there is scope for code optimization and interpreters allow code modification at run time. Both are used by programmers and both have their own specifications and advantages. In compilers there is scope for code optimization and interpreters allow code modification at run time. Both are used by programmers and both have their own specifications and advantages.

Comparative chart

Interpreter Compiler
Entrance The interpreter takes a single statement as input. The compiler takes the entire program as input.
Object code No intermediate object code is generated in the interpreter. Intermediate object code is produced in the compiler
Control statements A slow execution of the Declaration of Conditional Control in Interpreter. Conditional control statements run quickly in the compiler
Conversion The higher level program becomes a lower level program each time. It is not necessary that the program is always compiled in Compiler.

Compiler definition Difference between Compiler and Interpreter

Difference between Compiler and Interpreter
Difference between Compiler and Interpreter

A compiler is a specialized program that processes source code written in a higher-level language into computer-understandable machine code. This machine code is actually in binary language that a processor understands and executes. To write source code, the programmer writes the program in a language such as C, C ++ or Pascal using some programming editor. This program is then run using a compiler that is appropriate for the language in which the source code is written. The input to a compiler is a complete program; it first parses it and then processes it. It performs a series of analyzes on the source code given as input, the lexical and syntactic analysis. After performing these two steps, the final task of the compiler is to generate the machine code.

Interpreter definition

Difference between Compiler and Interpreter
Difference between Compiler and Interpreter

An interpreter is a program that performs phrase-by-phrase (line-by-line) translation of the source code of the program written in some higher-level language. An interpreter, when given a program, takes its single line, interprets it, and then executes it. The interpreter generates intermediate code after interpreting the source code and therefore executes it. There is no compilation stage and no machine code is generated. This is how the interpreter translates and runs the entire program line by line. Preferred when immediate instruction per instruction execution is required. They are especially useful when testing code. Every time a program is to be executed, the interpreter interprets it in the same way.

Differences in a nutshell

  1. The compiler processes the entire program; The interpreter interprets the code line by line.
  2. The compiler produces binary machine code; The interpreter generates an intermediate code.
  3. Compiler machine code can be saved and reused once compiled; The interpreter has to interpret the source code every time.
  4. Compilers examine the validity of the code syntax; interpreters check keywords.
  5. In the compiler, the execution of the program is fast; in the interpreter, the execution of the program is slow.
  6. Debugging is tricky in compilers; debugging is easy on interpreters.
  7. Compilers show errors after verifying full source code; the interpreters display the errors for each statement in the code in the specified sequence.
  8. The compiler machine code is further processed by hardware; The intermediate code of the interpreter is processed by another specialized program.
  9. Compilers do not require a source code file at run time; interpreters require a source code file for runtime execution.
  10. In compilers, the program is executed after the compilation stage; the interpreters run the program directly without any compilation.
  11. The compiler uses more memory; The interpreter requires less memory.

Conclusion

Computer architecture and the understanding terms associated with it can be a troublesome task and these two terms above are similar that they have various differences between them, but they always seem similar to each other. This article, therefore, seeks to explain the differences between them to help people create a clear understanding.

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