An exclamation mark, also known as an exclamation point, is a punctuation mark used to express strong emotions, such as surprise, excitement, or anger. It is typically placed at the end of a sentence or phrase. On a TI-4 calculator, you can write an exclamation mark by pressing the “ALPHA” key followed by the “9” key.
Exclamation marks are important because they help to convey the tone and emotion of a written message. They can also be used to emphasize a particular point or to draw attention to important information. In addition, exclamation marks are often used in headlines and titles to grab the reader’s attention.