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Find the running sum of an Array

nums = [ 3, 1, 2, 10, 1 ]

runningSum = [ 3, 3+1, 3+1+2, 3+1+2+10, 3+1+2+10+1 ]

runningSum = [ 3, 4, 6, 16, 17 ]


 Java

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 public class RunningSum {
    public static void main(String args[]) {
      int[] nums = { 1, 2, 3, 4 };
      int[] runningSum = findRunningSum(nums);
      for(int x: runningSum)
          System.out.print(x+" ");
    }
    public static int[] findRunningSum(int[] nums) {
        int[] runningSum = new int[nums.length];
        int sum = 0;
        for(int i=0; i<nums.length; i++){
            sum += nums[i];
            runningSum[i]=sum;
        }
        return runningSum;
    }
 }

Python

def runningSum(arr):
    result = [None] * len(arr)
    sum = 0
    for i in range(0, len(arr)):
        sum += arr[i]
        result[i] = sum
    return result

arr = [1, 2, 3, 4]
print(runningSum(arr))

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