# SmartiCalc Quickstart

SmartiCalc’s interface is designed to be similar to that of a handheld calculator while offering advanced features not found in a typical production model. This app is intended to only be operated in portrait mode. At the top of the screen is a menu bar with five selectable functions. Below this is the display of calculations and results, with results in a slightly larger size by default; this display is scrollable and previous calculations and results are found above in a lighter gray color. The remaining majority of the screen is taken up by the input keypad—there are three major variants of which two have minor sub-variants, leading to five in total.

SmartiCalc has a number of different Modes of operation which determine what kind of number the calculation is using. Most handheld calculators offer just floating-point calculations, while SmartiCalc offers in addition: complex, rational (fraction), integer and “Base N”. Several of these modes are multi-precision (arbitrary accuracy), or have multi-precision variants available. This Quickstart covers use of floating-point mode first in order to teach the basics of SmartiCalc’s operation; use of other modes is similar enough that use can be determined by experimentation, further detailed operation specifics are covered in the pages accessible from the menu at the top right of this screen.

### Operation basics

In this Manual, key presses by the operator are represented as , while the read-out on the display is represented as 0. After performing the calulation:

7

And below this the current calculation reads:

3·5×2

Both of these are saved when entering subsequent calculations and either can be pasted into the current calculation with a long press (after scrolling the display up, if necessary). Notice that while entering the above calculation, the current numerical value is displayed as the result, so firstly 3.5 and secondly 2. Before is pressed the calculation remains editable with the backspace key.

After pressing , it is possible to begin another calculation:

-10,000,000

Notice that the commas separating thousands appear in both the calculation and result automatically; you should not try to press as this button is used for separating parameters to functions taking multiple parameters.

Care has been taken to try to ensure that only valid calculations can be entered, for example pressing twice does not produce ×× in the running calculation. Some errors cannot be trapped, for example entering:

Produces in the result display:

ERR05

(This is the internal error code for attempted division by zero.) Notice that the current calculation remains editable and it is possible to correct it using the backspace key and other keys, for example:

Now produces the display:

0.2

### Navigating the Manual

To view other pages of this Manual, select from the menu which opens when the icon at the top-right of this screen is pressed. To return to the main screen, select the back icon at the top left of this screen. Note that the chosen manual page and scroll position is preserved, allowing for easy experimentation with the app.