Map, Filter, Reduce

nums = [1, 2, 3, 4]
squared = list(map(lambda x: x*x, nums))
print(squared)

nums = [1, 2, 3, 4, 5, 6]
even = list(filter(lambda x: x % 2 == 0, nums))
print(even)

from functools import reduce
nums = [1, 2, 3, 4]
total = reduce(lambda a, b: a + b, nums)
print(total)