Fill data automatically in worksheet cells
Select one or more cells you want to use as a basis for filling additional cells. For a series like 1, 2, 3, 4, 5, type 1 and 2 in the first two cells. Drag the fill handle .If needed, click Auto Fill Options. and choose the option you want.

Is there an AutoFill in Excel?

What is AutoFill? Excel has a feature that helps you automatically enter data. If you are entering a predictable series (e.g. 1, 2, 3…; days of the week; hours of the day) you can use the AutoFill command to automatically extend the sequence.

How do I AutoFill an entire column in Excel?

Fill formulas into adjacent cells

Click Home > Fill, and choose either Down, Right, Up, or Left. Keyboard shortcut: You can also press Ctrl+D to fill the formula down in a column, or Ctrl+R to fill the formula to the right in a row.