HP 40G manual Accessing the display history, $/3+$@ a 175@, Key Function

Storing a value in a variable

Accessing the display history

You can save an answer in a variable and use the variable in later calculations. There are 27 variables available for storing real values. These are A to Z and θ. See Chapter 11, “Variables and memory management” for more information on variables. For example:

1.Perform a calculation.

45 >￿@8 >[8@3 >(17(5@

2.Store672a?athe result in the A variable.

>$/3+$@ A >(17(5@

3.Perform another calculation using the A variable. 95 >￿@2>;@ >$/3+$@A

Pressing *k, enables the highlight bar in the display history. While the highlight bar is active, the following menu and keyboard keys are very useful:

Key	Function
*k,&23<a, *e,	Scrolls through the display history.
	Copies the highlighted expression to the
6+2:a	position of the cursor in the edit line.
	Displays the current expression in standard
	mathematical form.
>'(/@	Deletes the highlighted expression from
	the display history, unless there is a cursor
	in the edit line.
>6+,)7@	Clears all lines of display history and the
CLEAR	edit line.

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