Exclamation mark (British English and Commonwealth English) or exclamation mark (American English) is a kind of punctuation mark, which is usually used after the insertion or exclamation mark to express strong feelings or high volume (shouting), show the key points, and often mark the end of the sentence. Example: "be careful!" Similarly, a bare exclamation point (without any front or back markers) is often used in warning signs.

Other uses include:

In mathematics, it represents factorials.

Several computer languages use "!" At the beginning of an expression that represents a logical negation: "! A "means" logical negation of a ", also known as" non-A ".

Some languages use "!" Means click on the consonant.