What distinguishes an arrow function from a regular function?

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There are a few main differences between arrow functions and regular functions in JavaScript:

1. Shorter syntax: Arrow functions have a more concise syntax than regular functions. They use a shorter syntax that is easier to read, especially for small functions.

2. Implicit return: Arrow functions have an implicit return statement, which means that you don't need to specify the return keyword if the function only has one statement.

3. "this" context: Arrow functions do not have their own "this" context. Instead, they inherit the "this" value from the surrounding scope. This can be useful in certain situations where you want to maintain access to an outer scope's "this" value.

4. Cannot be used as constructors: Arrow functions cannot be used as constructor functions, as they do not have a prototype property.

Overall, arrow functions can be a useful tool for simplifying your code and making your functions more concise - especially for small, simple functions that are used frequently in your code. However, they may not be appropriate for all situations, and you should always consider the specific needs of your code before using them.