:Variables, used for recalculating the equation by different values.
XYZ
:Used for setting value of variable X,Y,Z.
Ans
: Last result, pressing will input last result.
()
: Brackets,for usage of complicated calculation with brackets.
: Power sign ^, means y-th power of x.
: Radical sign √, means y-th root of x.
%
:One hundred percent sign.
+
: Plus.
-
: Minus.
×
or
*
: Multiply.
÷
or
/
: Divide.
0
to
9
: Digital key.
.
: Decimal point.
=
: Begin to calculation. Press it on blank line below equation will redo last operation. Long press will display the process of calculation (for paid user).
HELP
: Usage help, etc.
FUNC
: Click to open function list.
CNST
: Constant.
: Real voice, tapping sound, mute switch.
TOOL
: Common used functions, such as common constant, hex converter, unit converter, currency converter and so on.
2. Usage and note
"x√y" means find the x-th root of y. For example: 3√27=3
"x^y" means x to the power of y,such as: 2^3=8, 2^(-3)=0.125, (-2)^3=-8, (-2)^(-3)=-0.125
"n!" means n factorial, n should be positive integer and no more than 170. For example: 5!=5×4×3×2×1=120
"×" could be ignored between one more brackets and between value and brackets, such as: 3(1+2)(2+3)π(3+1). But can't be ignored between value and constant or function, such as: 3π,, 2sin(90) are both invalid.
To input "0.25", you can only press “.25”. And it will prevent input like "0.24.34".
Press copy button can "identify" the value on the cursor intelligently, even to negative number.
Pressing copy button will also copy the text to system clipboard, for other applications. it can not support pasting the text from system clipboard.
Put cursor on number, then press OPRT->Amount in words, will get the amount in words of that number.
You can name functions or constants by unicode.
Decimal digits can only be choosed in scientific notation mode.
Press "=" button below last equation, will perform last plus/minus/power/divide operation.
In main UI, you can press volume up or down key of your device to adjust volume to what you like.
In constant and function list, the last positon where you have pressed will be remembered for the next use.
It is recommended that testing your self-defined function before saving it.
To paid users, when app exit, the constant, function and text history record will be exported to directory /IdeaCalc-backup/ of SD card. If you reinstalled app, just import from sd card.
To export saved calculation history texts, it will create texts.xml file at /IdeaCalc-backup in SD card.
To export self-defined constants or functions, it will create constants.xml and functions.xml file at /IdeaCalc-backup in SD card.
You can edit constants.xml, functions.xml or texts.xml file on PC before import, to create your own constants, functions or calculation texts more easily.
Excuting import will take data from constants.xml, functions.xml or texts.xml to software list. Existed items will be kept, and repeated item will not be import again.
Excuting export will delete the old constants.xml, functions.xml or texts.xml file on SD card and creat a new one.
In unit conversion or currency conversion, after you get the converted value, you can press the "ok" button to display result in main UI.
As default, the software will be install to internal storage. If you like, you can move it to SD card by other tools.