How do I add together integers in a list in python

Question

If I had a list like

x = [2, 4, 7, 12, 3]

What function/process would I use to add all of the numbers together?

Is there any way other than using sum ()?

Answer 1

you can try :

x = [2, 4, 7, 12, 3]    
total = sum(x)

Answer 2

x = [2, 4, 7, 12, 3]
sum_of_all_numbers= sum(x)

or you can try this:

x = [2, 4, 7, 12, 3] 
sum_of_all_numbers= reduce(lambda q,p: p+q, x)

Reduce is a way to perform a function cumulatively on every element of a list. It can perform any function, so if you define your own modulus function, it will repeatedly perform that function on each element of the list. In order to avoid defining an entire function for performing p+q, you can instead use a lambda function.

Answer 3

This:

sum([2, 4, 7, 12, 3])

You use sum() to add all the elements in a list.

So also:

x = [2, 4, 7, 12, 3]
sum(x)

Answer 4

First Way:

my_list = [1,2,3,4,5]
list_sum = sum(list)

Second Way(less efficient):

my_list = [1,2,3,4,5]

list_sum = 0
for x in my_list:
   list_sum += x