nums = [1, 2, 3, 4, 5, 6, 7, 8, 9]
def square(n):
return n ** 2
squares = list(map(square, nums))
print(squares) # [1, 4, 9, 16, 25, 36, 49, 64, 81]
# lambda
squares_lambda = list(map(lambda x: x**2, nums))
print(squares_lambda) # [1, 4, 9, 16, 25, 36, 49, 64, 81]