如何在迭代行中执行累积求和

nums = [1, 2, 3, 4, 5]
sum = 0
for num in nums:
    sum += num
print(sum)  # 输出15

def accumulate_sum(nums, index):
    if index == len(nums):
        return 0
    return nums[index] + accumulate_sum(nums, index + 1)

nums = [1, 2, 3, 4, 5]
sum = accumulate_sum(nums, 0)
print(sum)  # 输出15

const nums = [1, 2, 3, 4, 5];
const sum = nums.reduce((accumulator, currentValue) => accumulator + currentValue, 0);
console.log(sum);  // 输出15