1CALCULATOR(1) General Commands Manual CALCULATOR(1)
2
6 calculator - simple desktop calculator
7
9 calculator
10
12 The FOX Calculator is a simple desktop calculator geared toward the
13 programmer. It supports not only a full complement scientific func‐
14 tions, but also common operations that programmers need, such as bit‐
15 wise operations, bitwise shifting, and base-2 logarithm and exponents,
16 and numeric conversion between hexadecimal, octal, binary, and decimal.
17 The FOX Calculator implements correct operator precedences, so expres‐
19 sions like 2+3*5 yield the correct result, which is 17, and not 25.
20 Also featured is a constant memory, which permanently stores its value
21 even if you exit the calculator and restart it later.
22
26 Pressing on the calculator icon brings up the Calculator Preferences
27 dialog. The Calculator Preferences dialog comprises three settings:
28 - Settings for the calculator itself;
30 - Color settings of the button groups;
31 - Information about the calculator.
32 In the Calculator settings panel, you can change font used for the dis‐
34 play, by pressing the "Set..." button to bring up the standard Font
35 Selection Dialog.
36 You can change the way numbers are printed as well. Checking "Always
38 show exponent" will cause the calculator display always to display the
39 number in exponential notation. Checking "Never show exponent" will
40 cause the calculator to render the number in simple dot notation.
41 The precision can be set by means of the spin button; the default pre‐
43 cision is set to 16. Finally, the calculator can be set to beep when
44 errors occur.
45 In the Color settings panel, you can change the colors of the various
47 button groups. The buttons are grouped by function; the numbers are in
48 one group, and the operators are in another, and so on.
49 In the About panel, some information is presented about the calculator,
51 like version number and author's contact.
52
55 You can enter a number by clicking on the digit buttons, or simply hit
56 the right digit on the keyboard. Numbers in exponential notation are
57 entered by entering the mantissa first, then hitting the "EXP" button,
58 and then entering the exponent. Up to 3 digits may be entered for the
59 exponent; entering more than 3 will cause the digits to shift, i.e. the
60 first digit entered will be dropped and replaced by the second, the
61 second digit will be replaced by the third, and the third will be
62 replaced by the new input.
63 Changing the sign of the exponent is accomplished by hittin the At any
65 time, you can hit the Backspace key to delete the last digit entered.
66 Two numbers, pi and e (euler's number) may be entered with a single
67 button:
68 pi - Enters the number 3.1415926535897932384626433833
70 e - Enters the number 2.7182818284590452353602874713 (hit the "inv"
72 button first)
73
76 The operators in the FOX Calculator are the usual suspects:
77 + Addition
79 - Substraction
81 * Multiplication
83 / Floating point division
85 In addition, FOX Calculator also includes bitwise operators, such as:
87 AND Bit-wise logical and
89 OR Bit-wise logical or
91 XOR Bit-wise logical exclusive or
93 NOT Bit-wise logical not
95 SHL Bit-wise shift left
97 SHR Bit-wise shift right
99 SAR Bit-wise signed shift right (hit the "inv" button first)
101 Also nice for programmers is the inclusion of integer operations:
103 mod Integer modulo
105 div Integer division (hit the
107 All the operators have certain precedence relations with each other, so
109 that an expression is evaluated correctly.
110
113 The Calculator incorporates the usual trigonometric functions:
114 sin Sine
116 cos Cosine
118 tan Tangent
120 asin Inverse sine or arc sine (hit the "inv" button first)
122 acos Inverse cosine
124 atan Inverse tangent
126 sinh Hyperbolic sine (hit the "hyp" button first)
128 cosh Hyperbolic cosine
130 tanh Hyperbolic tangent
132 asinh Inverse hyperbolic sine (hit the "hyp" and "inv"buttons first)
134 acosh Inverse hyperbolic cosine
136 atanh Inverse hyperbolic tangent
138 For the first 6 functions, the angle mode determines whether the argu‐
140 ment is specified in terms of degrees, radians, or grad. Note that the
141 angle mode is preserved across invocations of the Calculator.
142
144 Other functions supported by the calculator are the following:
145 log Base 10 logarithm
147 ln Natural logarithm
149 2log Base 2 logarithm
151 x! Factorial
153 nPr Permutations
155 nCr Combinations
157 sqrt Square root
159 x^y X raised to the power y
161 1/x Reciprocal
163 10^x Base 10 exponentiation (hit the "inv" button first)
165 e^x Exponentiation
167 2^x Base 2 exponentiation
169 x^1/y X raised to the power 1/y
171 x^2 X squared
173
175 The calculator works in IEEE 746 double precision mode; for bit-wise
176 operations, it uses 32 bit integers. Thus, the numeric limits are as
177 follows:
178 Smallest real number: 2.2250738585072010e-308
180 Largest real number: 1.7976931348623158e+308
181 Smallest integer number: 0
182 Largest integer number: 4294967295
183
185 This manpage was originally written by Bastian Kleineidam
186 <calvin@debian.org> for the Debian distribution of the FOX Toolkit.
187 The main author of FOX is Jeroen van der Zijp <jeroen@fox-toolkit.org>.
189 For a list of contributors see /usr/share/doc/libfox0.99/AUTHORS.
190 30 January 2002 CALCULATOR(1)