A for loop iterates over items in a sequence: python for letter in "Python": print(letter) Output: P, y, t, h, o, n (each on its own line). The variable letter takes each character in turn.
Structure: for keyword, loop variable, in keyword, sequence, colon, indented body. The loop runs once for each item, with the loop variable set to that item. For loops work on strings, lists, ranges, and any iterable. They're more common than while loops in Python.