Can you tell me how to add up the data in one column?

Hello everyone. Can you tell me how to add up the data in one column? There is a column with numbers. The task is to add it up according to the principle 1+2=, 1+2+3=, 1+2+3+4= …

If you are looking for a running total, watch the below video.

This is what I needed. Thank you very much!