Compiler:

• A compiler is a software tool that takes source code as input.
• It reads the entire source code at once, checks for syntactical errors, and if no errors are found, it generates an intermediate file called bytecode.
• If there are syntax errors, it throws a compile-time error and halts the compilation.
• Since it processes the whole code at once, it displays all syntax errors together.

Bytecode:

• Bytecode is an intermediate, platform-independent code generated by the compiler when the source code is free of syntax errors.
• It acts as a bridge between the source code and the machine code.
• In Java, the bytecode file has a .class extension.
• Bytecode is not directly executed by the machine; instead, it requires an interpreter or Virtual Machine (like the Java Virtual Machine - JVM) for execution.

Interpreter:

• An interpreter reads and executes the bytecode line by line.
• It checks for logical errors during execution and throws runtime errors if found.
• If an error occurs, the interpreter halts execution immediately, showing one error at a time.
• Since it processes code sequentially, it is generally slower than a compiler.

✅ Difference Between Compiler and Interpreter: