Highlight text with math signs

Question

I need to highlight some text with the command \emph whose content is "valeurAop += analogRead(mesure_aop)" : the compilation gives me an error, I think it is due to the mathematical symbols.

I tried \emph{opvalue} $+= $ \emph{analogRead (aop_measure) but I still get the same error:"Missing $ inserted$

How can I solve this problem?

Thanks

Never use underscore in text alone. If you want underscore, use a backlash preceding it, like this \_. That's because underscore is designed to be used in math mode to display subscript. — SolidMark, Jun 26 '21 at 15:50

Zarko · Accepted Answer · 2021-06-26T17:48:33.520

1

Like this?

\documentclass{article}
\begin{document}
$\mathit{opvalue} +=  \mathit{analogRead(aop_measure)}$
$\mathit{opvalue}\mathrel{+=}\mathit{analogRead(aop_measure)}$
\end{document}

The second example is suggested by @David Carlisle).

edited Jun 26 '21 at 17:48

answered Jun 26 '21 at 16:45

Zarko

296,517

2

possibly \mathrel{+=} – David Carlisle Jun 26 '21 at 16:54
@DavidCarlisle, yes, with it the spacing looks better. I add this possibilities to the answer. Thank you very much! – Zarko Jun 26 '21 at 17:50
Thanks, it works very well @Zarko and David – Nicolas Jun 26 '21 at 19:12
1

Probably better \mathrel+= – egreg Jun 26 '21 at 22:52
@egreg Why \mathrel+= instead of \mahthrel{+=}? – Gaussler Jun 27 '21 at 10:57

score 1 · Answer 2 · answered Jun 27 '21 at 08:12

You want to use a math formula. In order to do this, you should

define a higher level commands for the variables;
define a math symbol for plus-equal, which should have the two parts next to each other;
use properly the underscore.

\documentclass{article}
\usepackage{amsmath} % not necessary for the example, but recommended
\newcommand{\lvar}[1]{\mathit{#1}}
\newcommand{\pluseq}{\mathrel+=}
\begin{document}
$\lvar{opvalue} \pluseq  \lvar{analogRead(aop_measure)}$
\end{document}

If you later change your mind, you can decide that the argument to \lvar is typeset upright, boldface or whatever by just changing the definition.

With \mathrel+= we make the whole combination a relation symbol, which seems the appropriate choice. TeX will never add space between consecutive relation symbol, nor break a line in the middle.

Highlight text with math signs

2 Answers2