1480. Running Sum of 1d Array

class Solution:
    def runningSum(self, nums: List[int]) -> List[int]:
        if nums:
            lst = [0] * len(nums)
            lst[0] = nums[0]
            for i in range(1,len(nums)):
                lst[i] = lst[i-1] + nums[i]
            return lst


class Solution:
    def runningSum(self, nums: List[int]) -> List[int]:
        for i in range(1,len(nums)):
            nums[i] = nums[i-1] + nums[i]
        return nums

class Solution:
    def runningSum(self, nums: List[int]) -> List[int]:
        arr = []
        sum = 0
        for i in nums:
            sum = sum + i
            arr.append(sum)
        return arr