Data Types
Labels
Labels are typically used as column or row headers or simply to identify whatever you have entered into the cell.

Constants
Constants refer to the (typically) numerical data that you have entered into cells. They are the entries in your spreadsheet that are not derived from equations or other analysis tools.

Functions and Formulas
Functions and formulas are expressions that you can use to manipulate or analyze information that you have entered into a cell. These expressions always begin with an = sign.

