Infinite counter generator

Generator that never ends.

generators itertools

Implement `counter(start=0, step=1)` as a generator yielding start, start+step, start+2*step, …

Constraints

start and step are integers; step ≠ 0.

Example

>>> c = counter(0, 2)
>>> [next(c) for _ in range(5)]
[0, 2, 4, 6, 8]

12 points ~12 min

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Hints

while True: yield val; val += step.

Test Results

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