importance: 4

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# Sum input numbers

Write the function `sumInput()` that:

- Asks the user for values using `prompt` and stores the values in the array.
- Finishes asking when the user enters a non-numeric value, an empty string, or presses "Cancel".
- Calculates and returns the sum of array items.

P.S. A zero `0` is a valid number, please don't stop the input on zero.

[demo]