python for loop
# Range: for x in range(5): print(x) # prints 0,1,2,3,4 # Lists: letters = ['a', 'b', 'c'] for letter in letters: print(letter) # prints a, b, c # Dictionaries: letters = {'a': 1, 'b': 2, 'c': 3} for letter, num in letters.items(): print(letter, num) # prints a 1, b 2, c 3