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# How to find Union of two lists in Python Hello everybody, welcome back to Programming In Python. Here in this post am going to tell you how to find the union of two lists in Python. Generally, `Union` means getting all the unique elements in both lists. So here I will take two lists and convert them to a set and then apply the `union` function on it to find all the unique elements n both lists. Not only for two lists the same way we can find the union of any number of lists.

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#### Union of two lists – Code Visualization

To find the Union of two lists in Python.

#### Approach:

• Read the input number asking for the length of the list using `input()` or `raw_input()`.
• Initialize an empty list.`lst = []`
• Read each number using a`for loop`
• In the for loop append each number to the list.
• Repeat the above 4 points for the second list `lst2[]` as well.
• Find `union` of two lists by converting lists into sets and using Python’s union function `set().union(lst, lst2)`
• Print the result.

#### Program:

```__author__ = 'Avinash'

lst = []
num = int(input("Enter size of list 1: \t"))
for n in range(num):
numbers = int(input("Enter any number: \t"))
lst.append(numbers)

lst2 = []
num2 = int(input("Enter size of list 2: \t"))
for n in range(num2):
numbers2 = int(input("Enter any number: \t"))
lst2.append(numbers2)

union = list(set().union(lst, lst2))

print("\nThe Union of two lists is \t", union)``` 