3. Looping over a collection

Avoid using an index just to access elements in a collection.

Direct iteration emphasizes the values you care about instead of the mechanics of how to reach them. Index-driven loops are best reserved for cases where the position itself is part of the logic.

3.1. Don’t do this

names = ['john', 'jane', 'jeremy', 'janice', 'joyce', 'jonathan']

for i in range(len(names)):
    print(names[i])

3.2. Do this

names = ['john', 'jane', 'jeremy', 'janice', 'joyce', 'jonathan']

for name in names:
    print(name)