Null Set

A null set, also called an empty set, is a collection with no elements inside. In other words, it contains nothing. For example, if you look for even numbers between 3 and 4, you'll find none, so the set of such numbers is empty. Mathematically, it's represented by symbols like {} or ∅. The null set is fundamental in mathematics because it acts as the starting point for building and understanding more complex sets and concepts; it’s the set that has zero members, representing the idea of “nothingness” in a precise way.