##### Finite and Infinite Set

**Finite set**

The element can be listed (limited)

Example:

- The set of all persons in your class
- Whole numbers between 5 and 45
- Natural numbers less than 30

**Infinite set**

The element cannot be listed (unlimited)

Example:

- Set of all point in a line segment
- Set of all natural numbers
- Set of all integers

##### Empty Set or Not

**Null or empty set **

Set with no elements

Example:

The sets of triangles having 4 sides

It is an empty set, because every triangle has 3 sides

**Not an empty set **

Set with elements

Example:

The set of even prime number

It is not an empty set, because even prime number is 2.

{2}