What is the difference between a dash and an em dash in a sentence?

What is the difference between a dash and an em dash in a sentence?

The main difference between a dash and an em dash in a sentence lies in their length and usage.

A dash is a punctuation mark that is shorter in length compared to an em dash. It is typically represented by a single hyphen (-) and is used to indicate a sudden break or interruption in a sentence. It can be used to set off a phrase or clause that provides additional information or to create emphasis. For example: "She was determined to finish her work - no matter what."

On the other hand, an em dash is longer and is represented by two hyphens (--), or in some cases, a single long dash (—). It is used to indicate a more significant break or interruption in a sentence. Em dashes are often used to set off a parenthetical phrase or to indicate an abrupt change in thought. For example: "The weather was perfect for a picnic -- sunny, warm, and clear."

In summary, while both a dash and an em dash serve to create breaks or interruptions in a sentence, the em dash is longer and typically used for more significant breaks or changes in thought.