Cumulative Sum

Problem

Return the running totals of data as a list, so element i is the sum of data[0] through data[i]. Return an empty list for empty input.

Hint

Keep a running total and append after each addition.

case 1

in: [[1,2,3]]

expected: [1,3,6]

case 2

in: [[]]

expected: []

case 3

in: [[5,-2,0]]

expected: [5,3,3]

case 4

in: [[1.5,2.5]]

expected: [1.5,4]

case 5

in: [[-1,-2,-3]]

expected: [-1,-3,-6]

Starter codePython

def cumulative_sum(data):
    # Your code here
    pass

5 test cases · run your code against them in the editor