The automatic constant allows you to do repetitive calculations with a common number and operator. The constant is set whenever a two-number operation is completed with the [ = ] button. When a calculation is completed, the operator and the last entered number or result are stored as the automatic constant. You can then enter a new number and press the [ = ] button, and the calculator will automatically complete the operation using the stored operator and constant. You can also repeatedly execute the automatic constant on the current display by simply pressing the [ = ] button. The automatic constant is cleared when the [CE/C] button is pressed, or the calculation mode is changed. You can turn the automatic constant off by unchecking this option in the Options menu. You may also disable and clear the constant for the current operation by option-clicking the [ = ] button. This will complete all pending operations without setting or activating the automatic constant.
