Add number to a total in a for loop

Question

I need to compute the mass of a series of objects in a list

for element in list:
    weight = "a calculation here"

How do I save the weight calculation and add it up for each time it goes through the for loop?

Does this answer your question? [Summing elements in a list](https://stackoverflow.com/questions/11344827/summing-elements-in-a-list) — TDG, May 21 '22 at 03:26

score 1 · Answer 1 · answered May 21 '22 at 03:13

1

for element in list:
    weight += "a calculation here"

Does this work for you?

answered May 21 '22 at 03:13

You forgot to initialize `weight` to 0 – Mechanic Pig May 21 '22 at 03:14
2

He doesn't have a problem with the weight variable. He might already declare it. His problem is how to accumulate weight. So I only show him the solution to the problem. – Teerapad Pipadboonyarat May 21 '22 at 03:18
1

Your answer could be improved by explaining what the `+=` operator is doing. – ddejohn May 21 '22 at 03:29

1 Answers1