Where is the class selector indicated in CSS syntax?

In CSS, the class selector is indicated by using a period (.) followed by the class name. This is the established syntax for targeting HTML elements that have a specific class attribute assigned to them. For example, if you have an HTML element like <div class="example">, you would use .example in your CSS to apply styling to all elements with that class.

Using a period is essential because it distinguishes class selectors from other types of selectors. The hash (#) is used for ID selectors, the asterisk (*) is known as the universal selector that targets all elements, and a colon (:) is typically used for pseudo-classes. Therefore, the use of a period is crucial for correctly applying styles to class-based HTML elements in CSS.