In Excel, the SUM function is one of the mathematical and trigonometric functions, which adds all the values. You can add a single value, a cell reference or a range, or a mixture of the three.

For example:

=SUM(A2:A 10)

=SUM(A2:A 10，C 1)

=SUM(A2:A 10，C2:C 10)

=SUM(A2:A 10，3)

=SUM(2，3，4)