java running sum of array

1class Solution {
2    public int[] runningSum(int[] nums) {
3        int[] sol = new int[nums.length];
4        sol[0] = nums[0];
5        for(int i = 1; i < nums.length; i++) {
6            sol[i] = sol[i-1] + nums[i];
7        }
8        return sol;
9    }
10}
11
12// Example: runningSum([1,3,6,9]) = [1, 4, 10, 19] = [1, 1+3, 1+3+6, 1+3+6+9]