## Definition of Singleton Set

A **Singleton Set** or **Unit Set** is a set having exactly one element. In other words, a set A is said to be a **Singleton Set** if the cardinality of the set is 1 i.e., \displaystyle n(A)=1

## Singleton set Symbol

Let a **Singleton Set** A has only one element that is 2. Then, it can be written as:

A = {2}

## Singleton Set Example

- \displaystyle A={x:x\in N,x<2}
- \displaystyle A={x:x\,\,is\,prime\,number,x<3}
- \displaystyle A={x:x\,is\,integer\,,\,-2<x<0}

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