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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
       programmer.  It supports	not only a full	 complement  scientific	 func-
       tions,  but  also common	operations that	programmers need, such as bit-
       wise operations,	bitwise	shifting, and base-2 logarithm and  exponents,
       and numeric conversion between hexadecimal, octal, binary, and decimal.

       The  FOX	Calculator implements correct operator precedences, so expres-
       sions like 2+3*5	yield the correct result, which	is  17,	 and  not  25.
       Also  featured 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
       dialog.	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 dis-
       play, by	pressing the "Set..." button to	bring up the standard Font Se-
       lection Dialog.

       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 calculator to render the number in simple dot notation.

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

       In the Color settings panel, you	can change the colors of  the  various
       button 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	entering the exponent.	Up to 3	digits may be entered for  the
       exponent; entering more than 3 will cause the digits to shift, i.e. the
       first digit entered will	be dropped and replaced	 by  the  second,  the
       second  digit  will be replaced by the third, and the third will	be re-
       placed 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

       -      Substraction

       *      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 argu-
       ment 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
       operations, 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.com>.
       For a list of contributors see /usr/share/doc/libfox0.99/AUTHORS.

				 January 2017			 CALCULATOR(1)

NAME | SYNOPSIS | DESCRIPTION | CONFIGURATION | ENTERING NUMBERS | OPERATORS | TRIGONOMETRIC FUNCTIONS | OTHER FUNCTIONS | LIMITS | AUTHOR

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