Exclamation mark
An exclamation mark (!) is a punctuation mark. It is used to show strong emotion at the end of a sentence or after an interjection.[1]
History[change]
The exclamation mark is made by putting a vertical line over a period. It is thought that it came from the Latin exclamation io, which shows joy. Over time, the I got put above the o and later the o became a dot.
Uses[change]
In coding, "!" sometimes means not. In mathematics, the use of an exclamation mark can be used for the factorial function (for example, <math>n!</math>).[2][3][4]
Related pages[change]
References[change]
- ↑ "Exclamation Point (or Exclamation Mark)". Grammarly. 2016-02-09. Retrieved 2020-10-17.
- ↑ "Compendium of Mathematical Symbols". Math Vault. 2020-03-01. Retrieved 2020-09-10.
- ↑ "Factorial Function !". www.mathsisfun.com. Retrieved 2020-09-10.
- ↑ Weisstein, Eric W. "Factorial". mathworld.wolfram.com. Retrieved 2020-09-10.
