how do you calculate a column of numbers - eg. A1 to A20?

Hello, I need to add a column of numbers from A1 to A20. What formula do I use?

=sum(a1:a20)

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"Jazzy1980" <Jazzy1980@discussions.microsoft.com> wrote in message
news:3F2BADCE-22CD-4D90-A664-FC2E0DE854B6@microsoft.com...
> Hello, I need to add a column of numbers from A1 to A20. What formula do I
use?