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Home Articles

Difference between Compiler and Interpreter

by Kiranlal VT
November 19, 2022
in Articles, Entri Skilling, Java Programming
Difference between Compiler and Interpreter
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Traveling to a foreign country where it would be difficult to converse in the native language would have been perilous. Without a translator, it would be difficult to anticipate receiving something in return when asked. Even though we don’t visit foreign countries on a daily basis, we communicate with a computer that cannot understand any human language. Did you know that although humans use high-level programming languages to interact with computers, these aren’t the only languages they can comprehend? System software such as compilers and interpreters contributes to the efficiency of the transportation process. What are the functions of these interpreters and compilers? They’re the same, right? Do compilers and interpreters have any differences?

Compilers and interpreters are essential tools required to translate programs written in high-level languages into machine code that a computer can comprehend. But there are some distinctions between a compiler and an interpreter, and they work very differently. A high-level language is typically used while creating a computer program. A high-level language is one that is understandable to us as humans. We refer to this as source code. A computer, however, cannot comprehend complex language. It solely comprehends machine code, which is a binary program encoded in 0s and 1s. We employ either a compiler or an interpreter to translate source code into machine code. A program created in a high-level language is translated into machine code that computers can understand using both compilers and interpreters. An interpreter and a compiler operate differently from one another, though.

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What is a Compiler?

Computer software known as a compiler quickly converts programming languages into machine code, assembly language, or low-level languages. Every program is converted to binary (1s and 0s), which a computer can theoretically understand and use to carry out the corresponding task. The syntax of the programming language used is one requirement that a compiler must meet. As a result, if the program’s syntax does not match the compiler’s analysis, an error occurs that needs to be fixed manually in the program.

The compiler’s primary task is to convert the program into machine code and inform the programmer of any faults, ranges, limits, etc., particularly syntactical errors. The entire program is analyzed and turned into machine code. The following phases can be used to characterize a compiler’s operation:

  1. Lexical Analysis

Splitting of source code into lexemes, an abstract unit. Each lexeme has a unique token that indicates whether it is a keyword, a string, or another type of variable.

  1. Syntax Analysis

The allocated tokens are organized into an Abstract Syntax Tree (AST) and have their syntax validated.

  1. Semantic Analysis

Semantic mistakes such as assigning the incorrect variable, using an undeclared variable, using keywords as variables, etc. are tested for in the AST.

  1. Intermediate Code Generation

Two or more intermediate code forms are produced during the compilation process.

  1. Optimization

The compilation process considers a variety of improvements that could be made to the work.

  1. Code Generation

The source program is transformed into an object program by the compiler, which also turns the intermediate optimized code into machine code.

The compiler has several benefits that can be summed up as follows:

  • Programs are translated by compilers in a single step.
  • The procedure goes more quickly.
  • The CPU is working harder.
  • Both syntactic and semantic faults can be checked at the same time.
  • It is easily supported by many high-level languages, such as C, C++, and Java.

The Role of compilers are as follows:

  • It provides an executable code after reading the source code.
  • Converts high-level programming code into a language that the CPU can understand.
  • The procedure is somewhat complex, and the analysis takes time.
  • Machine-specific binary code will include the executable code.
  • The total run time is longer and takes up more memory.

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What is an Interpreter?

A computer program known as an interpreter transforms program statements into machine code. Program statements comprise scripts, precompiled code, and source code. An interpreter interprets a program more quickly than a compiler ever could. Interpreters are especially helpful for novices since they make dealing with source code simpler.

Similar in function to a compiler, an interpreter functions similarly. The interpreter reads the program line by line while looking for mistakes and runs the program simultaneously; in contrast, the compiler generates no intermediate code forms.

The interpreter provides several benefits that can be distilled into the following:

  • It is in charge of the line-by-line translation of the program.
  • The size of interpreters is less.
  • Its strength is its adaptability.
  • The localization of errors is made easier.
  • The employment of interpreters makes it simpler to implement the concepts of computer programming languages and facilitates the execution of programs.

The Role of the Interpreter is listed below:

  • Line by line, it translates program statements into machine code.
  • permits program modification while it is running.
  • As it proceeds line by line, analysis takes comparatively less time.
  • The program runs somewhat slowly because the analysis is done each time it is performed.

Difference Between Compiler and Interpreter

Although it appears that Compiler and Interpreter function similarly by converting programs into machine code, there is very little difference between the two. Here are the distinctions:

Compiler Interpreter
In a compiler, the entire program is examined at once. A line-by-line analysis of the program is done by an interpreter.
Only once the full program has been constructed does it begin to run. Every line in the program is examined before it is executed, thus any errors have been reported line by line.
An output program from the compilation runs separately from the source file. The interpretation is assessed after every run because it produces no output program.
At the conclusion of compilation, all errors are displayed, and the program cannot be launched until they are fixed. Shows the mistakes line by line. The program continues to operate after the error has been located and is resolved.
The compiler outputs object code or intermediate code forms. No intermediate code forms are produced by the interpreter.
Compilers have higher CPU utilization. The compiler needs more CPU than the interpreter.
The entire program may need to be reorganized in response to an error. Only a portion of the software is reorganized as a result of errors.
You can check for syntactic and semantic mistakes at the same time. Only grammatical mistakes are checked.
A disk storage device that houses machine code. There is nowhere to store machine code.
Compilation speeds up the application. It is significantly quicker than an interpreter because it takes up less time. Interpreted programs operate more slowly. It takes more time than a compiler, hence it is slower.
The compiler scans the entire program and looks for time-saving executions several times. Since code is examined line by line, no thorough optimization is done.
The full program is input by the compiler for analysis. Code lines are entered into the interpreter for analysis.

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Conclusion

Comparable in operation to an oven and an induction stove are compilers and interpreters. Its purpose is to translate a programming language into machine language, and it works virtually the same way. But how it works is different. Their use is influenced by the language and the objective.

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Kiranlal VT

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