The alarm clock function is used by almost everyone, and on Apple iPhones, users have long been accustomed to quickly adjusting to their desired time by sliding the scroll wheel in the alarm setting interface.

However, observant users recently discovered that this seemingly infinitely scrollable alarm clock wheel is actually a "false loop." Some users conducted tests and found that when continuously sliding the wheel in one direction, after a period of time, they could actually reach the end of the wheel. The endpoint is 16:39.

This discovery surprised many people, as in previous usage, few people would operate so extensively to explore the truth behind the scroll wheel.

Some analysts believe that Apple uses a very long array to replace a loop because arrays are easier to program than loops. As for why the endpoint is 16:39, users explain that the maximum number of options for this wheel is 1000. Hours start from 1, and 1000 modulo 24 equals 16, so it's 16. Minutes start from 0, and 1000 modulo 60 equals 40, so it displays as 39.

Users joked: "Programmers never expected this generation of users to be so idle."

Although the discovery revealed that the alarm clock scroll wheel is a false loop, this doesn't affect most users' daily usage. After all, during normal alarm time adjustment, we don't endlessly slide the wheel in one direction.