Describe a set using rule method?

A set can be described using the rule method by specifying a property or condition that its members must satisfy. For example, the set of all even integers can be defined as ( S = { x \in \mathbb{Z} \mid x \text{ is even} } ), where ( \mathbb{Z} ) represents the set of all integers. This method allows for the inclusion of an infinite number of elements by stating the defining characteristic rather than listing each element explicitly.