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Control flow · easy

10. for loops and range

Iterating over sequences and iterables.

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A `for` loop iterates over any iterable — lists, strings, ranges, dict keys, files. `range(n)` produces integers `0..n-1` lazily.

python
total = 0
for i in range(1, 6):
    total += i
# total == 15

for i, tx in enumerate(["mint", "burn"]):
    print(i, tx)

`enumerate` yields (index, value) pairs, and `zip` pairs up multiple iterables:

python
for name, price in zip(names, prices):
    print(name, price)

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Check your understanding

  1. 1. What does `range(1, 6)` produce?

  2. 2. What does `enumerate(items)` yield?

  3. 3. What does `zip(a, b)` do?

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