latex arrow with text above
\documentclass{article}
\usepackage{mathtools}
\begin{document}
$\xrightarrow[\text{world}]{\text{hello}}$
$\xRightarrow[\text{world}]{\text{hello}}$
\bigskip
$\xrightarrow[g(x)]{f(x)}$
$\xRightarrow[g(x)]{f(x)}$
\end{document}text over left right arrow latex
\documentclass{article}
\usepackage{amsmath}
\makeatletter
\newcommand{\xLeftrightarrow}[2][]{\ext@arrow 0099\Leftrightarrowfill@{#1}{#2}}
\makeatother
\begin{document}
$A \xLeftrightarrow{\mathit{hello}} B$
\end{document}Copyright © 2021 Codeinu
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