Use AutoFill to fill in data...
With
the AutoFill feature, you can have Excel automatically continue a
series of numbers, number and text combinations, dates, or formulas,
based on a pattern that you establish.
Select the first cell in the range that you want to fill.
1. Type
the starting value for the series.
2. Type
a value in the next cell to establish a pattern,
For example, if you want the series 1, 2, 3, 4, 5..., type 1 and 2 in the first
two cells. If you want the series 2, 4, 6, 8..., type 2 and 4. If you want
the series 2, 2, 2, 2..., you can leave the second cell blank.
3. Select
the cells that contain the data that you want to fill into adjacent
cells.
4. Drag
the fill handle
(the small black square in the lower-right corner of the selection --
when you point to the fill handle, the pointer changes to a black
cross) across the cells that you want to fill.
5. You
can use the Auto Fill Options button, which appears after you drag the
fill handle, to choose how to fill the selection. For example, you can
choose Fill Formatting Only or Fill Without Formatting.
Tip
You can automatically fill a formula downward, for all adjacent cells
that it applies to, by double-clicking
the fill handle of the first cell that contains the
formula. For example, you have numbers in cells A1:A15 and B1:B15, and
you type the formula =A1+B1 into cell C1. To copy that formula into
cells C2:C15, select cell C1 and double-click the fill handle.