Set

A set is a collection of distinct objects or items, called elements, grouped together based on common properties or criteria. Think of it as a container that holds items like numbers, letters, or objects, without any specific order. For example, the set of natural numbers less than 5 is {1, 2, 3, 4}. Sets are fundamental in mathematics because they help organize, analyze, and compare groups of objects, and they are used to define more complex concepts like functions, relations, and algebraic structures.