What is the main difference between class selectors and ID selectors in CSS?

Class selectors and ID selectors serve different purposes in CSS, and one of the key distinctions lies in how they are defined in the stylesheet. Class selectors are prefixed with a dot (.), indicating that they can be applied to multiple elements throughout the document. This allows for flexible styling across various elements that share the same class.

In contrast, ID selectors use a hash (#) and are meant to be unique within a page, applying to a single element at a time. The use of different prefixes—dot for classes and hash for IDs—is a fundamental aspect of CSS syntax that helps developers distinguish between these two types of selectors easily.

This understanding of how classes and IDs are defined and used is essential for effectively utilizing CSS in web design.