Step 1: English Answer

The sleep/wake button on an iPhone is a physical button located on the right side of the device. It is a small, round button that is slightly raised from the surface of the phone. The sleep/wake button is used to turn the iPhone on or off, lock the screen, and take screenshots.

**Here are some additional details about the sleep/wake button:**

* On older iPhone models (iPhone 6s and earlier), the sleep/wake button is located on the top of the device.
* On newer iPhone models (iPhone 7 and later), the sleep/wake button is located on the right side of the device.
* The sleep/wake button can also be used to force restart the iPhone if it is frozen or unresponsive.
* The sleep/wake button is not used to adjust the volume of the iPhone. The volume buttons are located on the left side of the device.

**Step 2: read more >>

Press and hold the sleep/wake button. A red Slide to Power Off slider appears on the screen. Slide the red slider to turn off the iPhone, and then wait a few seconds. Press and hold the sleep/wake button again until the Apple logo appears on the screen.read more >>