Name: Qalculate! (GTK UI)
Author: Hanna Knutsson

Qalculate! is a multi-purpose cross-platform desktop calculator. It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for everyday needs (such as currency conversion and percent calculation).
 Features include a large library of customizable functions, unit calculations and conversion, physical constants, symbolic calculations (including integrals and equations), arbitrary precision, uncertainty propagation, interval arithmetic, plotting, and a user-friendly interface.

Qalculate! (GTK UI)

Changes:
 <ul>
 <li>Option to show parsed expression in result field</li>
 <li>Add two's complement input and binary bits to preferences, and preserve these settings when leaving programming keypad</li>
 <li>Ask for the desired interpretation the first time percent addition is used (e.g. 100 + 10% equals 110 or 100.1)</li>
 <li>Download button in dialog shown when new version is available, on Windows</li>
 <li>Support for solving equations containing if() function</li>
 <li>Support for solving root(a, x)=b (requires rational value for ln(a)/ln(b))</li>
 <li>New functions: powertower() and multiples()</li>
 <li>New units for solar radius, mass, and luminosity</li>
 <li>Use parentheses for exponent using scientific notation (with power of 10)</li>
 <li>Support integer factorization of integers in matrix/vector, and of numerator and denominator in rational number</li>
 <li>Relaxed conditions for (x^a)^b = x^(a × b) and x^a × x^b = x^(a + b) when complex numbers are deactivated (fixes segfaults)</li>
 <li>Portuguese (Portugal) translation</li>
 <li>Fix AltGr (primarily for input of operators) on Windows</li>
 <li>Fix (ax + n)^2 &gt; 1, where n is even and a is not 1, returning false</li>
 <li>Fix setbits() function</li>
 <li>Fix Number::equals(0, ..., true) when number is infinite (affects replace() function)</li>
 <li>Minor bug fixes and feature enhancements</li>
 </ul>

Changes:
 <ul>
 <li>Detection of potential spelling mistakes (a warning will be shown)</li>
 <li>Add support for n...m, j:k, and j:i:k syntax, for sequence of numbers, e.g. 1...3 = (1:3) = (1:1:3) = [1 2 3] (note that brackets may be required for colon syntax to avoid conflict with time format)</li>
 <li>Improved "where" operator, including improved output of parsed expression, support for previously undefined variable names, and assignments before expression (e.g. "a=2, b=2, a^b")</li>
 <li>Click on binary digit in result to flip bit</li>
 <li>Improvements/fixes to conversion completion and menus</li>
 <li>Add retry and cancel buttons to error dialog after failure to save preferences or definitions</li>
 <li>Add last result to stack when pressing Enter with empty expression (was unintentionally disabled)</li>
 <li>Selection of default number of bits for binary and hexadecimal numbers in programming keypad</li>
 <li>Always show binary position numbers in result if numbers of bits are higher than 16, and improve appearance</li>
 <li>More rounding methods</li>
 <li>New units: LightSecond, LightMinute, and LightHour</li>
 <li>New functions: bitget(), bitset(), setbits(), integerDigits(), digitGet(), digitSet(), flip(), colon(), and foreach()</li>
 <li>Support for hexadecimal floating-point literals using 0x...p... notation (0x1.4p3 = 0x1.4 * 2^3 = 10)</li>
 <li>Improve handling of zero solution and initial guess in newtonsolve() and secantsolve(), and check validity of solution</li>
 <li>Change handling a vectors in multiple function arguments (of non-vector type) - return vector instead of matrix, require equal number of elements, and use the same vector index for all arguments for each function instance (e.g. atan2([1 2], [3 4]) = [atan2(1, 3) atan(2 4)]</li>
 <li>Set handle vector property by default, for text, date, and boolean arguments, and for arguments, in global non-builtin functions, without specified type, and enable parsing of vectors for text arguments</li>
 <li>Do not apply "read precision" setting to exponents for values with units</li>
 <li>Change from line to point (or dot) plot style for data with many discontinuous points</li>
 <li>lambertw(x*e^x, 0)=x if x&gt;=-1</li>
 <li>Use parentheses for number with scientific notation in more cases</li>
 <li>Allow plot grid values higher than 1 (true) to specify line width</li>
 <li>Fix dsolve(diff(y, x) = y), and similar</li>
 <li>Fix x and y reversed for paired matrix when using plot dialog</li>
 <li>Fix log(1, 1) (undefined)</li>
 <li>Fix "to"-conversion to prefix and add "prefix" conversion option (for optimal prefix)</li>
 <li>Fix segfault in newtonsolve() and secantsolve() when equation does not contain variable</li>
 <li>Fix conversion to angle unit for complex angle, cis and polar forms</li>
 <li>Exchange rates fixes</li>
 <li>Minor bug fixes and feature enhancements</li>
 </ul>

Changes:
 <ul>
 <li>Support for specifying a fixed denominator for display of fractions (e.g. "0.3 ft ➞ 1/8 ≈ (3 + 5/8) in")</li>
 <li>Always add result to history (even if identical to previous) if expression contains a function generating a random number</li>
 <li>Prefer capitalized function name (over name with underscore), when completing function name</li>
 <li>Improve decision to (not) update calculate-as-you-type result when last character is an operator</li>
 <li>Add percent and permille output options in rational number form menu</li>
 <li>Return gcd of numerators divided by lcm of denominators in gcd() with non-integer rational numbers, and vice versa for lcm()</li>
 <li>Add units for mean Gregorian and tropical years</li>
 <li>Ignore underscore in number</li>
 <li>Replace defunct exchange rates source and fix bitcoin exchange rate</li>
 <li>Fix keypad button (up/down) for cycling through expression history</li>
 <li>Fix asin(x)=a, acos(x)=a, and atan(x)=a, when a contains an angle unit and default angle unit is set</li>
 <li>Fix output of value converted to unit expression with numerical multiplier in denominator, e.g. "➞ L/(100 km)"</li>
 <li>Fix segfault when trying to solve "(x*sqrt(x)-y*sqrt(y))/(sqrt(x)-sqrt(y))=x+sqrt(x*y)+y"</li>
 <li>Fix parsing of case insensitive object name ending with Unicode character when followed by another Unicode character in expression, e.g. "микрометр"</li>
 </ul>

Changes:
 <ul>
 <li>Fix besselj() and bessely()</li>
 <li>Fix display of matrices and vectors with complex number form other than rectangular (default)</li>
 <li>Fix conflict between decibel units (e.g. "0dB") and duodecimal 0d… syntax (now requires at least two digits)</li>
 <li>Fixes for title options in plot() function</li>
 <li>Auto-update number bases above programming keypad when entering simple integers, even if calculate-as-you-type is deactivated</li>
 </ul>

Qalculate! is a multi-purpose cross-platform desktop calculator. It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for everyday needs (such as currency conversion and percent calculation).
      Features include a large library of customizable functions, unit calculations and conversion, physical constants, symbolic calculations (including integrals and equations), arbitrary precision, uncertainty propagation, interval arithmetic, plotting, and a user-friendly interface.
    

Qalculate! (GTK UI)

Powerful and easy to use calculator

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