What is Bytecode?

Bytecode is a high-level, platform-independent, machine-readable code that is compiled from source code and executed by an interpreter or virtual machine (VM). It's a intermediate representation of code that's not yet machine-specific.


Key aspects of bytecode:


- Platform-independent: Bytecode can run on any platform that has a compatible VM or interpreter, without needing to be recompiled.

- High-level: Bytecode is often higher-level than machine code, retaining more of the original source code's semantics.

- Interpreter or VM: Bytecode is executed by an interpreter or VM, which translates it into machine code.


Examples of bytecode:


- Java bytecode (.class files): Compiled from Java source code, executed by the Java Virtual Machine (JVM).

- .NET bytecode (CIL - Common Intermediate Language): Compiled from C#, F#, etc., executed by the .NET Common Language Runtime (CLR).

- Python bytecode (.pyc files): Compiled from Python source code, executed by the Python interpreter.


Bytecode offers advantages like platform independence, improved security, and easier maintenance. However, it may require an interpreter or VM to run, which can introduce overhead compared to native machine code execution.

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