The KCalc Handbook
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# Chapter 2. Usage

General usage is straight forward and similar to the way most simple scientific calculators operate, but take note of the following special KCalc features:

Result Stack

  Each time you left mouse button click on the = button or press your keyboard's Enter or = keys, the display result is written to KCalc's result stack. You can navigate through the result stack with your keyboard's Up and Down arrow keys.

Percent Function

  The percent function works somewhat differently to that on most calculators. However, once understood, its enhanced functionality proves quite useful. See the section about the percent function for further details.

Cut and Paste

  - Pressing the left mouse button on KCalc's display will place the displayed number on to the clipboard.

  - Pressing the right or middle mouse button on KCalc's display will paste the clipboard content into the display if the content of the clipboard is a valid floating point number.

Statistical and Trigonometric Modes

  KCalc can run in Statistical or Trigonometric mode. Pressing F3 will toggle between the modes or you can set the mode with the Configuration dialog brought up by pressing the Configure button or with F2.

# 2.1. Statistical Mode

In this mode the left column of buttons is allocated to statistical functions:

Buttons | Function
--- | ---
N | Recall the number of data items entered
Inv N | Display the sum of all data items entered
Mea | Display the mean of the data items entered
Inv Mea | Display the sum of the square of all data items entered
Std | Display the standard deviation (n)
Inv Std | Display the population standard deviation (n-1)
Med | Display the median
Dat | Enter a data item
Inv Dat | Clear last data item entered
Cst | Clear the store of all data item entered

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Introduction |  | Trigonometric Mode