HP 39g+ Graphing manual Storing and recalling variables

Storing and recalling variables

You can store numbers or expressions from a previous input or result into variables.

Numeric Precision A number stored in a variable is always stored as a 12- digit mantissa with a 3-digit exponent. Numeric precision in the display, however, depends on the display mode (Standard, Fixed, Scientific, Engineering, or Fraction). A displayed number has only the precision that is displayed. If you copy it from the HOME view display history, you obtain only the precision displayed, not the full internal precision. On the other hand, the variable Ans always contains the most recent result to full precision.

To store a value 1. On the command line, enter the value or the calculation for the result you wish to store.

2. Press

3.Enter a name for the variable.

To store the results of a calculation

4. Press .

If the value you want to store is in the HOME view display history, for example the results of a previous calculation, you need to copy it to the command line, then store it.

1. Perform the calculation for the result you want to store.

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2.Move the highlight to the result you wish to store.

3.Press to copy the result to the command line.

4.Press .

12-2 Variables and memory management