When
there is a comma (,) between cell references in a
function, each cell is used individually to
perform the calculation. Example:
=SUM(A1,A2,A3) is the same as
the formula =A1+A2+A3
When there is a colon (:) between cell
references in a function, each cell and all those
between are used to perform the calculation.
Example:
=SUM(A1:A3) is the same as the
formula =A1+A2+A3
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