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* **fungsi**: adalah fungsi yang ada di bawah dekorator (di bawah `@app.get("/")`).

{* ../../docs_src/first_steps/tutorial001.py hl[7] *}

Ini adalah fungsi Python.

Fungsi ini dipanggil **FastAPI** setiap kali menerima request ke URL "`/`" dengan operasi `GET`.

Di kondisi ini, ini adalah sebuah fungsi `async`.

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Anda bisa mendefinisikan fungsi ini sebagai fungsi normal daripada `async def`: