What function is performed by the button AutoSum marked by the letter "Y"

[Max]

ok, guess your Q is in the subject line:

Re: What function is performed by the button AutoSum marked by the letter
"Y"

In xl97, the button "Autosum" is marked by the letter sigma S
and it gives the SUM worksheet function

For example:

Suppose you have 2 numbers,
one each in A6 and A7

If you select the immediate cell below, i.e. A8,
and click AutoSum
this will put in A8: =SUM(A6:A7)

Excel will "auto-sense" that the cells A6:A7
are to be summed

And likewise, for numbers entered in row-wise,
for example:
If numbers are in A6 and B6,
with Autosum clicked in cell C6