Verzeichnis `macros/generic/xint`

README.md

% README % xint 2.0a1 % 2026/11/01

Source:  xint-calx.dtx 2.0a1 2026/11/01
Author:  Jean-François Burnol
Info:    Expandable operations on big integers, decimals, fractions
License: LPPL 1.3c

Description

The calx package and its superset the xintexpr package provide:

\calxeval: numerical expression parser for floating-point computations.
\calxinteval: numerical expression parser for computations with big integers.

Floating-point computations are supported up to 100 significant digits of precision. A full set of trigonometric, logarithmic, and exponential functions is implemented.

The two parsers are also available under their legacy names \xintfloateval and \xintiieval, respectively.

Loading xintexpr automatically loads calx and provides a third parser, \xinteval, which handles fractions. It also loads the legacy macro interface packages xintcore, xint, and xintfrac.

All three parsers produce their results by expansion alone. They accept comma-separated inputs and nested structures using square brackets. Users can define custom variables and functions.

Usage

The way of loading calx or xintexpr depends on whether you are using LaTeX or not.

with LaTeX, add \usepackage{calx} (or xintexpr if you want \xinteval) to the document preamble,
else, do \input calx.sty (or xintexpr).

The user can employ calx/xintexpr with either one of etex, pdftex, xetex, luatex (they all default to the Plain TeX format), or with optex (i.e. luatex with OpTeX format), or with context (luametatex engine).

Example

Here is an example typical of the xintexpr users morning routine for many years (xintexpr was first released in 2013):

\xinteval{reduce(add(1/i^3, i=1..25))}

It expands (in two steps) to:

2560976152652211536408111110189/2131858131361319942957376000000

Repository

The repository is at https://github.com/jfbu/xint, and the issue tracker is at https://github.com/jfbu/xint/issues.

Documentation

Both the user manual and the commented source code are in xint-calx.pdf.

The file CHANGES.html is available at https://jfbu.github.io/xint. Its source, xintchanges.md, is included in the CTAN upload and can also be accessed in TeX Live using texdoc xintchanges.md.

Instructions for custom installation

The xint*sty, calx*sty, and calx*tex files are extracted via the command etex xint-calx.dtx.

Other extracted files are used only for building the PDF documentation and can be discarded. For instructions on building this documentation, see the extracted xint-calx.tex.

The recommended TeX directory structure is:

doc/generic/xint/xintchanges.md
doc/generic/xint/README.md
doc/generic/xint/xint-calx.pdf
source/generic/xint/xint-calx.dtx
tex/generic/xint/xint*sty
tex/generic/xint/calx*sty
tex/generic/xint/{calxlog.tex, calxlogdata.tex}
tex/generic/xint/{calxtrig.tex, calxtrigdata.tex}

License

This Work may be distributed and/or modified under the conditions of the LaTeX Project Public License version 1.3c. This version of this license is in

http://www.latex-project.org/lppl/lppl-1-3c.txt

and version 1.3 or later is part of all distributions of LaTeX version 2005/12/01 or later.

This Work has the LPPL maintenance status author-maintained.

The Author of this Work is Jean-François Burnol.

This Work consists of the file xint-calx.dtx (and its derived files such as xint-calx.pdf), README.md and xintchanges.md.

Herunterladen des vollständigen Inhalts dieses Pakets in einem Zip-Archiv (6.0M).

Xint – Expandable arbitrary precision floating point and integer operations