### Python Sets

Python also includes a data type for sets. A set is an unordered collection with no duplicate elements.

Basic uses include membership testing and eliminating duplicate entries.

Set objects also support mathematical operations like union, intersection, difference, and symmetric difference.

Curly braces or the ** set() **function can be used to create sets.

**Note:** to create an empty set you have to use set(), not {}; the latter creates an empty dictionary.

#### Properties of set

Order of elements are not preserve.

duplicate elements are not allowed.

```
#creating set
my_set=set({1,1,2,3,4,4,5})
print(my_set)
print("length of my_set is ",len(my_set))
```

{1, 2, 3, 4, 5}
length of my_set is 5

#### What next ?

Python Dictionaries