# List comprehensions are a compact way to define a list squares = [x**2 for x in range(1, 10)] # squares = [1, 4, 9, 16, 25, 36, 49, 64, 81, 100] # You can also add a condition to filter out some of the elements evens = [i for i in range(1, 10) if i % 2 == 0] # evens = [2, 4, 6, 8] # If your list is multi-dimensional, you can nest for-loops matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] flattened = [val for row in matrix for val in row] # flattened = [1, 2, 3, 4, 5, 6, 7, 8, 9]