Iterating Over Multidimensional Lists in Python

Let's now learn how to iterate over multidimensional lists using loops. Let's say we have the following list:

lst = [
	['a', 'b', 'c'],
	['d', 'e', 'f'],
	['g', 'h', 'i']
]

Since this list is two-dimensional, to iterate over it you need two nested for loops:

for sub in lst:
	for el in sub:
		print(el)

Given a two-dimensional list:

lst = [
	[1, 2, 3],
	[4, 5, 6],
	[7, 8, 9]
]

Use a loop to print all the items in the list to the console.

Given a two-dimensional list:

lst = [
	[2, 4, 6],
	[3, 5, 7],
	[9, 12, 15]
]

Use a loop to find the sum of the elements of this list.

Given a two-dimensional list:

lst = [
	['a', 'b', 'c'],
	['d', 'e', 'f'],
	['g', 'h', 'i']
]

Use a loop to merge all the elements of a list into a string.