Swift:如何在函数执行之外终止函数

func calculateSum(numbers: [Int]) -> Int {
    var sum = 0
    for number in numbers {
        if number == 0 {
            return 0 // 如果遇到0，立即终止函数并返回0
        }
        sum += number
    }
    return sum
}

let numbers = [1, 2, 3, 4, 5]
let sum = calculateSum(numbers: numbers)
print(sum) // 输出：15

let numbersWithZero = [1, 2, 0, 4, 5]
let sumWithZero = calculateSum(numbers: numbersWithZero)
print(sumWithZero) // 输出：0