Average of a List of Integers, Returning 0 for an Empty List

This warm-up comes from a timed online assessment for a data science role. Write a function `average(table)` that returns the arithmetic mean of the numbers in the list `table`. If the list is empty, return 0. ### Function Signature ```python def average(table: list[int]) -> float: ``` ### Rules - For a non-empty list, return the sum of the elements divided by the number of elements, as a floating-point number (IEEE 754 double precision). - For an empty list, return `0.0`. - Do not round the result. ### Constraints - `0 <= len(table) <= 10^5` - `-10^6 <= table[i] <= 10^6` - The sum of the elements is at most `10^11` in absolute value, so it is exact in both 64-bit integers and double precision; the expected result is that exact sum divided by the length, correctly rounded to a double. ### Examples **Example 1** - Input: `table = [3, 4, 8]` - Output: `5.0` **Example 2** - Input: `table = []` - Output: `0.0` - Explanation: An empty list has no mean; the specification asks for 0 instead of an error. **Example 3** - Input: `table = [-2, 2, 1]` - Output: `0.3333333333333333`