Python · Theory

iter()

Theory

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iter() is built into Python. You do not import it. Freshers only need one honest call and the printed result — not a long definition.

iter() — output — 10 then 20. iter + next walk one by one.

Wrong type often raises TypeError. Empty values matter for bool/all/any. Don’t mix iter up with a similar name (sorted vs sort, int vs float).

Exam tip

Call iter() once and say what prints.

# iter()
it = iter([10, 20])
print(next(it))
print(next(it))

iter() — output: 10 then 20. iter + next walk one by one.