How do I have to implement the following comparison [TikZ]

Question

How do I have to implement the following comparison?

\documentclass{scrartcl}
\usepackage{etoolbox}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
 \pgfmathparse{sin(60)}
 \let\x=\pgfmathresult
 \ifnumgreater{\x}{0}{}{}
\end{tikzpicture}
\end{document}

Yes, but \x seems to be not merely a number. TeX's complaint is Missing = inserted for \ifnum — Jürgen, Apr 18 '18 at 11:30
Maybe kind of related: https://tex.stackexchange.com/questions/426483/why-ifthenelse-doesnt-compile-for-me/426485 — TeXnician, Apr 18 '18 at 11:37

score 2 · Accepted Answer · answered Apr 18 '18 at 11:37

\ifnum which is called does only work with whole numbers (no fractions). Therefore you need another test:

\documentclass{scrartcl}
\usepackage{xparse}
\usepackage{tikz}

\ExplSyntaxOn
\NewDocumentCommand { \xifnum } { }
    {
        \fp_compare:nTF
    }
\ExplSyntaxOff

\begin{document}
\begin{tikzpicture}
 \xifnum{sin(60) > 0}{
    \node {x};
 }{
    \node {y};
 }
\end{tikzpicture}
\end{document}

How do I have to implement the following comparison [TikZ]

1 Answers1