How to frame inline text with a box?

Question

I am trying to frame a text inline like this:

The text above is from the book Differential Geometry of Curves and Surfaces from Kristopher Tapp.

As requested by some users, some code to edit:

\documentclass{article}

\usepackage{amsmath}
\usepackage{amsthm}

\theoremstyle{plain}
\newtheorem{theorem}{Theorem}[section]

\begin{document}

\begin{theorem}
    Bla bla bla.
\end{theorem}

\begin{proof}
    Bla bla bla bla.

    (1) \(\implies\) (2) Bla bla bla.
\end{proof}

\end{document}

Answer 1

Like this:

Code:

\documentclass{article}

\usepackage{amsmath}
\usepackage{amsthm}

\theoremstyle{plain}
\newtheorem{theorem}{Theorem}[section]

\begin{document}
    
    \begin{theorem}
        Bla bla bla.
    \end{theorem}
    
    \begin{proof}
        Bla bla bla bla.
        
        \fbox{(1) \(\implies (2)\)} Bla bla bla.
    \end{proof}
    
\end{document}