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Interpreter
What Interpreter Means?
Interpreter is also a language translator that translates a source code(.c) into a machine code(.obj). But it converts only one source code instruction to a machine code instruction at a time. Therefore a compiler processes the entire program in one go while interpreter processes one instruction at a time.
Error In Source Code
The interpreter checks for errors in each source code instruction and indicates it to the programmer instantly. Thus clearing errors for a programmer is not that much headache. As interpreter execute the instruction, only after the error in a instruction is corrected. This process continues until the last line of a program is reached.
How Interpreter Works
Interpreter replaces a single statements to a single machine language instruction at a time. A single statement is a line terminated by semicolon. The following diagram clearly demonstrate how interpreter translate source code to a machine code.
Compiler vs Interpreter
| Compiler | Interpreter |
|---|---|
| Scans entire program before translating it into object code(machine readable). | Translates one instruction at a time. |
| Slow in debugging. | Fast in Debugging. |
| Execution time is less. | Execution time is more. |
| C, C++ are the best examples which uses compiler. | Python, Ruby, Matlab and Perl are the best examples which uses interpreter. |
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