How to use SUMIFS in Excel?

Question

excel

There are 2 columns with different numbers. It is necessary to get the sum of numbers from column A, provided that in the same line in column B the number >=0. How can this be implemented?
I can't write =SUMIFS(A:A; B:B; >=0). And I can't specify a range...

Answer 1

I can't write =SUMIFS(A:A; B:B; >=0)

you can, just add quotes around the condition. The formula has help, it clearly says
=SUMIFS(summation_range; condition_range; condition)