Difference between Compiler and Interpreter

1. Compiler:
It is a translator which takes input i.e., High Level Language and produces an output of low level language i.e. machine or assembly language.

  • Compiler is more intelligent than an assembler it checks all kinds of limits, ranges, errors etc.
  • But it’s program run time is more and occupies a larger part of memory. It has slow speed because a compiler goes through the entire program and then translates the entire program into machine codes.

Figure – Compiler-Process

2. Interpreter:
An interpreter is a program which translates a programming language into a comprehensible language. –

  • It translates only one statement of the program at a time.
  • Interpreters, more often than not are smaller than compilers.

Figure – Interpreter-Process

Let’s see the difference between Compiler and Interpreter:

S.No. Compiler Interpreter
1. Compiler scans the whole program in one go. Translates program one statement at a time.
2. As it scans the code in one go, the errors (if any) are shown at the end together. Considering it scans code one line at a time, errors are shown line by line.
3. Main advantage of compilers is it’s execution time. Due to interpreters being slow in executing the object code, it is preferred less.
4. It converts the the instructions into systematic code. It doesn’t convert the instructions instead it directly works on source language.
Eg. C, C++, C# etc. Python, Ruby, Perl, SNOBOL, MATLAB etc.

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