How to show brackets in a foreach loop?
add tag
topnush 
```
\documentclass{beamer}
\usepackage{tikz}

\begin{document}

\begin{frame}
\frametitle{}
\uncover<1-10>
{
 $S$ = \foreach [count=\y] \x in {\{0\},\{0,1\},{0,1,2},{4,1,2},{4,1,2},{4,1,2},{4,1,2},{4,8,2},{4,8,9},{4,8,9}}{\only<\y>{\x}}
}

\end{frame}
\end{document}
```


I would like the curly brackets around the sets to all be shown. Normally I would do `$\{0,1,2\}$` but that doesn't work either. Strangely {0} is shown properly but {0,1} is not. I tried  `\{0\,1\}` but then the comma isn't shown.
Top Answer
samcarter 
You can wrap the items in your list in an additional pair of curly brackets. Without them your list looks just like `{x0x, x0, 1x,...}` to TikZ.

```
\documentclass{beamer}
\usepackage{tikz}

\begin{document}

\begin{frame}
\frametitle{}
\uncover<1-13>
{
 $S$ = \foreach [count=\y] \x in {{\{0\}},{\{0,1\}}}{\only<\y>{\x}}
}


\end{frame}
\end{document}
```

![document.gif](/image?hash=edac30f36cc1bd9087f53a021d022a6798a8882a4973bf006d5ac3b072420dc8)
comments
transcript

Enter question or answer id or url (and optionally further answer ids/urls from the same question) from

Separate each id/url with a space. No need to list your own answers; they will be imported automatically.