Qalculate

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Qalculate is a multi-purpose cross-platform desktop calculator that features 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.

Installation

USE flags

USE flags for sci-libs/libqalculate A modern multi-purpose calculator library

curl	Add support for client-side URL transfer library
gnuplot	Enable support for gnuplot (data and function plotting)
hardened	Disable unsafe functions like 'command' and variables like 'uptime'.
icu	Enable ICU (Internationalization Components for Unicode) support, using dev-libs/icu
readline	Enable support for libreadline, a GNU line-editing library that almost everyone wants
test	Enable dependencies and/or preparations necessary to run tests (usually controlled by FEATURES=test but can be toggled independently)

Data provided by the Gentoo Package Database · Last update: 2024-04-16 23:34 More information about USE flags

Emerge

root #emerge --ask sci-libs/libqalculate

GUI applications

Qalculate-gtk

root #emerge --ask sci-calculators/qalculate-gtk

Qalculate-qt

root #emerge --ask sci-calculators/qalculate-qt

Usage

Basic calculations

To perform basic calculations with qalculate, use it like a regular calculator:

user $qalc 1 + 1

1 + 1 = 2

Interactive mode

To enter qalculate's interactive mode, run qalc:

user $qalc

>

And start performing calculations:

user $qalc

> 1 + 1

  1 + 1 = 2

>

Using the previous result

To use the previous result in a new calculation, use the ans keyword:

user $qalc

> 1 + 1

  1 + 1 = 2

> ans + 2

  ans + 2 = 4

>

See also

• bc — arbitrary-precision fixed-point mathematical scripting language