%%
%% The LaTeX Companion, 3ed
%%
%% Example A-2-12 on page II-659 in "The L3 programming layer{} --- Computation support".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3exa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{123.0pt}

%StartShownPreambleCommands

%StopShownPreambleCommands

\begin{document}
\[ \inteval{5/3} = \inteval{-5/-3} = \inteval{0 - (5/-3)} \]
\[ \fpeval{floor(5/3)} \leq \fpeval{ceil(-5/-3)}
                                \approx  \fpeval{-(5/-3)} \]
\end{document}