A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
This is very easy to do.
Start with the first cell and type 1 into that cell.
In the lower right corner of the cell, notice the handle. (That's its correct name.)
Rest your mouse pointer on the handle and it changes to a '+'
Now hold down the CTRL key and drag the handle down. Ta da! You can also drag to the right.
Wonder what happens if you don't hold down the CTRL key while dragging the handle? Try it.
Wait ... let me take cover first!