Which line will be executed first in a function that has four steps?

In Python, when a function is called, the interpreter starts executing from the first statement inside the function body. The function definition itself is parsed when the module is loaded, but execution of the function’s code begins only at the point of the call. Therefore, the very first line of the function body is the first line that runs. If the function contains four distinct steps, the first step will execute before any of the subsequent steps. This order is deterministic and follows the top‑to‑bottom sequence of the function body, unless control flow statements such as return, break, or exceptions alter the path. Understanding this execution order is essential for debugging and for designing functions that rely on side effects or initializations.