Sum Until Zero

MEDIUMLoops

Read a series of positive integers from the user. Stop when the user enters 0. Output the total of all numbers entered (not counting the 0). If the first number entered is 0, output 0.

Use a WHILE loop.

Input: A sequence of integers ending with 0. Output: The sum of all non-zero entries.

Example:

Input:  5
        10
        3
        0
Output: 18

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Sample Test Cases

Test 1: Basic sum

Inputs: 5, 10, 3, 0

Expected: 18

Test 2: Immediate zero

Inputs: 0

Expected: 0

Test 3: Single number

Inputs: 7, 0

Expected: 7

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