1. A formula may consist of operators, cell references, range names, values and functions.
2. A formula always start with an equal to (=) sign.
3. When a formula is entered in the cell, and then the ENTER key is pressed, only the calculated result is displayed in the cell and not the formula.
4. If a cell containing formula is made an active cell, though it still shows the value, but in the formula bar, the formula is displayed.
