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Python: Cumulative sum of the elements of a given list

Python List: Exercise - 267 with Solution

Write a Python program to get the cumulative sum of the elements of a given list.

Sample Solution:

Python Code:

from itertools import accumulate
def cumsum(lst):
  return list(accumulate(lst))
nums = [1,2,3,4]
print("Original list elements:")
print(nums)
print("Cumulative sum of the elements of the said list:")
print(cumsum(nums)) 
nums = [-1,-2,-3,4]
print("\nOriginal list elements:")
print(nums)
print("Cumulative sum of the elements of the said list:")
print(cumsum(nums))

Sample Output:

Original list elements:
[1, 2, 3, 4]
Cumulative sum of the elements of the said list:
[1, 3, 6, 10]

Original list elements:
[-1, -2, -3, 4]
Cumulative sum of the elements of the said list:
[-1, -3, -6, -2]

Flowchart:

Flowchart: Cumulative sum of the elements of a given list.

Visualize Python code execution:

The following tool visualize what the computer is doing step-by-step as it executes the said program:


Python Code Editor:

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Python: Tips of the Day

Floor Division:

When we speak of division we normally mean (/) float division operator, this will give a precise result in float format with decimals.

For a rounded integer result there is (//) floor division operator in Python. Floor division will only give integer results that are round numbers.

print(1000 // 300)
print(1000 / 300)

Output:

3
3.3333333333333335