What is the use of a 24-hour clock instead of a 12-hour clock?

A 24-hour clock is used to eliminate any confusion or ambiguity when expressing time, especially in situations involving international travel, military operations, or medical professionals. It also helps to avoid confusion due to AM/PM indicators, which are not used in a 24-hour clock. The 24-hour clock system is used internationally, and it stops any confusion in different time zones.