How to evaluate the sum of list only for few elements

Question

I have list and k = 8 (maximum sum). I want to add those elements of list whose total sum is equal or smaller than k = 8 and I want the number of elements only whom I have added.

What I have tried:

lst = [1,2,3,4,7,9,12]
final = []
sum = 0
for i in range(len(lst)):
    if sum < 8:
        sum = sum +i
        final.append(i)
print(final)         

The list is sorted. it may be unsorted by user input. First I will sort the list. Then I will check the condition and adding one by one and append only those elements.

As this code doesn't give correct output as I want, what should I do?

Answer 1

as Aravind said.the i is index not value

lst = [1,2,3,4,7,9,12]
final = []
sum = 0
for item in lst:
    if sum < 8:
        sum = sum +item
        final.append(item)
print(final)

and according to Ram.you should not use sum as a variable.is a keyword in python.

Answer 2

From what I have understood from your question.

You are given a list of elements (not necessarily sorted) and a value k . You must return the items of list whose sum is less than or equal to k .

Here is the code

lst = [1,2,3,4,7,9,12]
lst.sort()
final = []
sums = 0
k = 10
for i in lst:
    if sums + i <= k:
        sums = sums + i
        final.append(i)
print(final)

# Output

final = [1, 2, 3, 4]