Language processor and its types

 

Language Processor and its types

The program or software which is used to convert the program written in high-level languages to machine code is known as language processor.

Different types of language processor are as here under.

·        Compiler

·        Interpreter

·        Assembler

Compiler

A compiler is a translating program that is used to translate high level program into machine codes. Before execution it translate whole program in machine code. If there are any errors in the source program errors must be removed before compiler translate the program.

The compiler translates whole program at once rather than a single statement into machine language instruction. Separate compiler is required for each and every programming language.

 

Interpreter

Interpreters translate single line at a time. The translated line is immediately executed before the next line is taken up for translation. Object program cannot produce by it. Every time the program is run, it has to be translated and executed.. Compilation is lengthy process and it can be postponed till the program has been thoroughly tested for logical and grammatical errors. For beginners and learners who do not need object programs for permanent storage and repeated use, interpreters are best suited.

Following are the difference between Compiler and Interpreter

S.N.	Compiler	Interpreter
1	It convert high level language into machine code	It also translate high level language to machine code
2	It translate whole program at a time.	It translate each statement at a time
3	It is slow for correcting errors.	It correct errors faster.
4	Object program created by compiler	Object program cannot create by interpreter.
5	All the errors in the program are displayed at once.	It reports the error at each time.
6	It takes less time to execute the program.	More time takes to execute the program.
7	Example: C, C++ etc.	Examples: QBASIC, Visual BASIC etc.

 

Assembler

An assembler is a translating program that translates (converts) an assembly language program into its equivalent machine language program. An input to the assembler is the assembly language program(also called source program), and its output is the machine language program(also called object program).