Calculator with history that allows you to assign expressions to the FnCalc button
By TadaoYamaoka
It is a calculator application that allows you to input and calculate while checking the calculation formula. Since the entered formula remains in the history, it is easy to correct and recalculate. In addition to the four arithmetic operations, you can use exponentiation, square root, factorial calculations and basic functions.
A feature not found in other calculators is the ability to assign arbitrary expressions to function buttons.
[Usage]
1. Normal calculation
Enter the calculation formula from the button and press the = button to display the result.
You can delete the character before the cursor with the BS button, and move the cursor with the ← → arrow to edit the calculation formula.
Press the CLS button to clear the formula and history you are entering.
2. Call history
↑ ↓ You can call the history with the arrow and edit it.
You can enter the previous calculation result at the cursor position with the Ans button.
3. Assign function buttons
Press the Edit button and then press any of F1 to F5 to enter edit mode.
Enter the expression you want to assign and press the = button or Edit button to complete editing and assign the expression entered in the function button.
For example, it is convenient to assign * 8% as a calculation formula for consumption tax.
By pressing the assigned function button, you can enter the entered expression at the cursor position.
Once assigned, the content will be saved even if you quit the app.
4. Input from the software keyboard
Tap the text box to display the software keyboard.
By using the software keyboard, you can enter functions that are not on the buttons.
Available functions are sqrt, log10, log, exp, abs, spherical, ceil, flooring, sin, cos, tan, asin, acos, atan.
Example) sin (Pi)
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