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CALCULATOR(1)		     General Commands Manual		   CALCULATOR(1)

NAME
     calculator - simple desktop calculator

SYNOPSIS
     calculator

DESCRIPTION
     The  FOX  Calculator  is a simple desktop calculator geared toward the pro-
     grammer.  It supports not only a full complement scientific functions,  but
     also  common  operations that programmers need, such as bitwise operations,
     bitwise shifting, and base-2 logarithm and exponents, and	numeric  conver-
     sion between hexadecimal, octal, binary, and decimal.

     The  FOX Calculator implements correct operator precedences, so expressions
     like 2+3*5 yield the correct result, which is 17, and not	25.   Also  fea-
     tured  is a constant memory, which permanently stores its value even if you
     exit the calculator and restart it later.

CONFIGURATION
     Pressing on the calculator icon brings up the Calculator  Preferences  dia-
     log.  The Calculator Preferences dialog comprises three settings:

     - Settings for the calculator itself;
     - Color settings of the button groups;
     - Information about the calculator.

     In the Calculator settings panel, you can change font used for the display,
     by pressing the "Set..." button to bring up the standard Font Selection Di-
     alog.

     You  can change the way numbers are printed as well.  Checking "Always show
     exponent" will cause the calculator display always to display the number in
     exponential notation.  Checking "Never show exponent" will cause the calcu-
     lator to render the number in simple dot notation.

     The precision can be set by means of the spin button; the default precision
     is set to 16.  Finally, the calculator can be set to beep when  errors  oc-
     cur.

     In  the Color settings panel, you can change the colors of the various but-
     ton groups.  The buttons are grouped by function; the numbers  are  in  one
     group, and the operators are in another, and so on.

     In  the  About  panel,  some information is presented about the calculator,
     like version number and author's contact.

ENTERING NUMBERS
     You can enter a number by clicking on the digit buttons, or simply hit  the
     right  digit  on the keyboard.  Numbers in exponential notation are entered
     by entering the mantissa first, then hitting the "EXP" button, and then en-
     tering the exponent.  Up to 3 digits may be entered for the  exponent;  en-
     tering more than 3 will cause the digits to shift, i.e. the first digit en-
     tered  will be dropped and replaced by the second, the second digit will be
     replaced by the third, and the third will be replaced by the new input.

     Changing the sign of the exponent is accomplished	by  hittin  the  At  any
     time,  you can hit the Backspace key to delete the last digit entered.  Two
     numbers, pi and e (euler's number) may be entered with a single button:

     pi - Enters the number 3.1415926535897932384626433833

     e - Enters the number 2.7182818284590452353602874713 (hit the "inv" button
     first)

OPERATORS
     The operators in the FOX Calculator are the usual suspects:

     +	    Addition

     -	    Subtraction

     *	    Multiplication

     /	    Floating point division

     In addition, FOX Calculator also includes bitwise operators, such as:

     AND    Bit-wise logical and

     OR     Bit-wise logical or

     XOR    Bit-wise logical exclusive or

     NOT    Bit-wise logical not

     SHL    Bit-wise shift left

     SHR    Bit-wise shift right

     SAR    Bit-wise signed shift right (hit the "inv" button first)

     Also nice for programmers is the inclusion of integer operations:

     mod    Integer modulo

     div    Integer division (hit the

     All the operators have certain precedence relations  with	each  other,  so
     that an expression is evaluated correctly.

TRIGONOMETRIC FUNCTIONS
     The Calculator incorporates the usual trigonometric functions:

     sin    Sine

     cos    Cosine

     tan    Tangent

     asin   Inverse sine or arc sine (hit the "inv" button first)

     acos   Inverse cosine

     atan   Inverse tangent

     sinh   Hyperbolic sine (hit the "hyp" button first)

     cosh   Hyperbolic cosine

     tanh   Hyperbolic tangent

     asinh  Inverse hyperbolic sine (hit the "hyp" and "inv"buttons first)

     acosh  Inverse hyperbolic cosine

     atanh  Inverse hyperbolic tangent

     For  the  first 6 functions, the angle mode determines whether the argument
     is specified in terms of degrees, radians, or grad.  Note	that  the  angle
     mode is preserved across invocations of the Calculator.

OTHER FUNCTIONS
     Other functions supported by the calculator are the following:

     log    Base 10 logarithm

     ln     Natural logarithm

     2log   Base 2 logarithm

     x!     Factorial

     nPr    Permutations

     nCr    Combinations

     sqrt   Square root

     x^y    X raised to the power y

     1/x    Reciprocal

     10^x   Base 10 exponentiation (hit the "inv" button first)

     e^x    Exponentiation

     2^x    Base 2 exponentiation

     x^1/y  X raised to the power 1/y

     x^2    X squared

LIMITS
     The calculator works in IEEE 746 double precision mode; for bit-wise opera-
     tions, it uses 32 bit integers. Thus, the numeric limits are as follows:

     Smallest real number: 2.2250738585072010e-308
     Largest real number:  1.7976931348623158e+308
     Smallest integer number: 0
     Largest integer number: 4294967295

AUTHOR
     This  man	page  was  originally  written by Bastian Kleineidam <calvin@de-
     bian.org> for the Debian distribution of the FOX Toolkit.

     The main author of FOX is Jeroen van der Zijp <jeroen@fox-toolkit.net>. For
     a list of contributors see /usr/share/doc/libfox0.99/AUTHORS.

				  January 2025			   CALCULATOR(1)
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