Which language uses bytecode to execute the program.

The language that uses bytecode to execute the program is Java. Here are the steps that Java uses:

1. The Java compiler takes Java code (.java file) and compiles it into bytecode (.class file). The bytecode is a platform-independent code that can be run on any machine, unlike machine code which is specific to a particular hardware architecture.

2. The Java Virtual Machine (JVM) then takes this bytecode and translates it into machine code, which is specific to the hardware of the machine. This is done at runtime, which means the bytecode is not translated into machine code until the program is actually run.

3. The JVM then executes the machine code. This two-step process of compiling to bytecode and then interpreting or compiling the bytecode to machine code at runtime is what allows Java to be a "write once, run anywhere" language.