next() — Python Technical Interview Questions & Answers

next()

next()

  • 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).

Technical Interview Tip: Call next() once and say what prints.

Code Examples for next()

Example

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

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

How to Explain next() to an Interviewer

Explain next() as if you are teaching a junior — definition, then one tiny script.

next() is built-in — no import. One call + exact output.

What does the example print, and why?

next() — output: 1 then 2

What mistake do freshers make with next()?

Wrong type → TypeError.