Python · Theory

next()

Theory

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

next() — output — 1 then 2. Default avoids StopIteration.

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

Exam tip

Call next() once and say what prints.

# next()
it = iter([1, 2])
print(next(it))
print(next(it, "end"))

next() — output: 1 then 2. Default avoids StopIteration.