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Python · Theory

enumerate()

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Theory

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enumerate()

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

enumerate() — output — 1 Asha then 2 Ravi. Index + value together.

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

Exam tip

Call enumerate() once and say what prints.

Example

# enumerate()
for i, n in enumerate(["Asha", "Ravi"], start=1):
    print(i, n)

enumerate() — output: 1 Asha then 2 Ravi. Index + value together.

Short notes

  • Defenumerate() is built-in — no import.
  • RuleOne call + exact output.
  • TrapWrong type → TypeError.

Questions

1

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

2

What does the example print, and why?

3

What mistake do freshers make with enumerate()?

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