In Excel the data are contained in ‘cells’
that are referenced using a grid numbering
system, as on maps or in the old game
of ‘battleships’.
You select a cell by clicking on it.
Cell ‘D5’ is selected in the illustration
below. It contains the value‘8’. The formula
bar shows the formula that led to that
value, it is the addition of the contents
of cells ‘C3’ and ‘D3’:
5 + 3 = 8
If you change the values
in any of the source cells ('C3' or 'D3')
then the value in 'D5' will automatically
update: