add numbers from two different lists python code example

Example 1: calculate the addition of two lists in python

list1 = [1, 2, 3]
list2 = [4, 5, 6]

# `zipped_lists` contains pairs of items from both lists.
# Create a list with the sum of each pair.
sum = [x + y for (x, y) in zip(list1, list2)] 

print(sum)
# [5, 7, 9]

Example 2: append two list of number to one python

listone = [1,2,3]
listtwo = [4,5,6]
mergedlist = []
mergedlist.extend(listone)
mergedlist.extend(listtwo)