Video narration
When you write code, the computer can’t run those words directly. A compiler is a translator: it turns your source code into machine code, or into a simpler lower-level form that can later become machine code. Compilation usually happens in a few big stages. First, the compiler reads your text and breaks it into pieces, then parses it to understand the structure—like checking the grammar of a sentence. Next, it analyzes what you wrote to catch mistakes: missing symbols, wrong names, or incompatible types. If there are errors, it reports them before producing an output. Then comes optimization, where the compiler looks for safer or faster ways to do the same work without changing what your program means. Finally, it generates the low-level instructions and packages them so your device can run the program. That’s why compilers matter: they bridge human ideas and hardware, and help catch problems early. Unlike an interpreter, a compiler produces a runnable output ahead of time.