Concept: Iterating over lists or tuples

To iterate over a list or tuple, you can use a for .. in loop. The loop will go through each item in the collection one by one.

Lists

users = ["Alice", "Bob", "Charlie", "David"]
for user in users:
    print(user, end=" ") # Output: Alice Bob Charlie David

Tuples

users = ("Alice", "Bob", "Charlie", "David")
for user in users:
    print(user, end=" ") # Output: Alice Bob Charlie David

As the example above shows, the syntax for iterating over a list or tuple is the same. If desired, you can also use the enumerate() function to get both the index and the value of each item in the collection. This function return s a tuple containing the index and the value of each item in the collection, which can be unpacked in the for .. in loop.

Lists

users = ["Alice", "Bob", "Charlie", "David"]
for (i, user) in enumerate(users):
    print(f"({i}) {user}", end=" ") # Output: (0) Alice (1) Bob (2) Charlie (3) David

Tuples

users = ("Alice", "Bob", "Charlie", "David")
for (i, user) in enumerate(users):
    print(f"({i}) {user}", end=" ") # Output: (0) Alice (1) Bob (2) Charlie (3) David