What will happen when the following code segment is executed?
values = [1.618, 2.71, 3.14]
print(values[3])

Question

BlackTom AI · Accepted Answer

When evaluating a list in Python, elements are accessed by zero-based indices, starting at 0. In this example, the list values has three elements: 0 -> 1.618, 1 -> 2.71, 2 -> 3.14. Trying to access values[3] attempts to reach a fourth position that does not exist.

Option 1: 'Python will display an out-of-range error' — This matches the expected behavior in Python, which raises an index-related error when an index outside the valid range is requested. In practice, the interpreter reports an IndexError with a message like 'list index out of range'. The given wording captures the essence of the error type, even though the precise message may vary by environment.

Option 2: 'Python won't display anything' — This would imply silent failure or no output, which is incorrect because an out-of-bounds index triggers an exception rather than quiet completion.

Option 3: 'Python will display 3' — This would require values[3] to hold the value 3, but as shown, there is no fourth element in the list, so no such value exists to print.

Option 4: 'Python will display 3.14' — This would correspond to an index of 2, i.e., values[2], not values[3]. Since the code asks for index 3, 3.14 at index 2 cannot be printed.

In summary, attempting to access an index equal to the list length (or greater) results in an IndexError, preventing any value from being printed and signaling that the index is out of range.

Fal25_CS003C_74229 Ch. 6 Pre-Quiz (Remotely Proctored)

What will happen when the following code segment is executed? values = [1.618, 2.71, 3.14] print(values[3])

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