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What will be the output of this Python code?

medium📝 Analysis Q4 of Q15
Intro to Computing - How Files and Folders Organize Data
What will be the output of this Python code?
numbers = [4, 8, 15, 16, 23, 42]
print(numbers.index(15))
A2
B3
C15
DError
Step-by-Step Solution
Solution:
  1. Step 1: Understand the list and the index method

    The list has elements: 4(0), 8(1), 15(2), 16(3), 23(4), 42(5). The index method returns the position of the first matching element.
  2. Step 2: Find the index of 15 in the list

    15 is at position 2 (counting from zero).
  3. Final Answer:

    2 -> Option A
  4. Quick Check:

    Index of 15 = 2 [OK]
Quick Trick: List index starts at 0 in Python [OK]
Common Mistakes:
MISTAKES
  • Counting index from 1
  • Confusing value with index
  • Expecting error if element exists

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