Text Formatting ⇒ How to put a box around multiple lines.

[mojin]

I just want to put a box around multiple lines. But I couldn't find a proper way to do it. Here is what I did,

Code: Select all

Code, edit and compile here:

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 \fbox{
 $\begin{array}{l}
 Given\; the\; vectors\; {\bf p}\; and\; {\bf n}\; as\; input,\; and\;
 the\;
 function\; {\sl f},\\ find\; the\; scalar\; \lambda\; that\; minimizes\; f({\bf
 p}+\lambda {\bf n}). \\
 Replace\; {\bf p}\; by\; {\bf p} + \lambda {\bf
 n}.\; Replace\; {\bf n}\; by\; \lambda {\bf n}. \end{array}$
 }
 
 
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Run LaTeX here

[phi]

This code is horrible, but it puts all three lines in a box, so what is your problem?
Here is a better code that produces similar output:

Code: Select all

Code, edit and compile here:

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\documentclass{article}
\let\vec\mathbf
\begin{document}
\fbox{%
    \parbox{0.8\linewidth}{%
        Given the vectors $\vec p$ and $\vec n$ as input, and the function $f$,
        find the scalar $\lambda$ that minimizes $f(\vec p + \lambda \vec n)$.
        Replace $\vec p$ by $\vec p + \lambda \vec n$.
        Replace $\vec n$ by $\lambda \vec n$.%
    }%
}
\end{document}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Run LaTeX here