Python sum of list

How to calculate the sum of a list in python

# Python code to demonstrate the working of  
# sum() 
numbers = [1,2,3,4,5,1,4,5] 
  
# start parameter is not provided 
Sum = sum(numbers) 
print(Sum) # result is 25  
# start = 10 
Sum = sum(numbers, 10) 
print(Sum) # result is 10 +25 = 35

Python sum of list

>>> list = [1, 2, 3]
>>> sum(list)
6

Sum of list of lists python

List = [[1, 2, 3],
        [4, 5, 6],
        [7, 8, 9]]
          

for i in zip(*List):
  print(i)

out: 
(1, 4, 7)
(2, 5, 8)
(3, 6, 9)

Python list sum

To get the sum of a list in python, you just call the built in sum() function.
An example:

>>> lst = [3, 7, 1, 9, 4]
>>> sum(lst)
24

Sum of elements in a list.

data = ['5', '4', '9']

sum(int(i) for i in data)
18

Source: stackoverflow.com

Sum the contents of a list python

# Sum the contents of a list without the builtin sum function

list = [1,2,3,4,5]
sum = 0

# loop through each position of the list and 
# add the contents of each position to the variable, sum
for i in range(len(list)):
	sum += list[i]

# result is 1 + 2 + 3 + 4 + 5 = 15
print(sum)

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