Complex numbers are stored in the memory stack using both Part1 and Part2. In |SYS| menu you can activate either |Complex in Cartesian| or |Complex in Polar| flag. Complex input mode flag is displayed in yellow at the top of the display and indicates the default mode f...

Integer numbers can be represented in iCALCULA not only in decimal basis but also in hexadecimal, octal and binary.

In order to operate with integers in non decimal basis you must activate Bases Calculator Mode. You activate it with |Activate Bases Calculator| function...

Fractions are stored in the memory stack using both Part1 and Part2 of the registers. If you enter an integer number and press |FRAC| instead of |ENTER| key, the integer number is stored in Part1 of x-register as numerator, display is cleared and you can continue with...

Real numbers are stored in the memory stack using only Part1 of the registers. Part2 remains null. 

Following operators perform computations on real numbers:

|+| : Computes (y + x)-registers and stores result in x-register

|-| : Computes (y - x)-registers and stores resul...

iCALCULA is based on Reverse Polish Notation (RPN) and the use of a four registers stack. Automatic storage of intermediate results is the reason that a RPN calculator easily processes complex calculations without the need of using parenthesis. The key to automatic sto...

THE STACK

The work area for calculations in iCALCULA is the STACK. The stack consists of four storage locations, called registers, which are "stacked" on top of each other. These registers — labeled x, y, z, and t — store and manipulate four current numerical quantities...

Following posts will cover some functionalities of the app iCALCULA. Through several practical examples calculator functioning will be introduced and explained.

iCALCULA's operating logic is based on an unambiguous, parentheses–free mathematical logic known as Reverse P...

Since I began teaching Physics in a University I've observed several patterns in our students far background that reflect how did some of them acquire certain skills and concepts, specially in the mathematical domain. As a father of two children that are now building u...