add tag
Anonymous 2257
I use `\usepackage[nosolutionfiles]{answers}` in this code. 
```
\documentclass[12pt,a4paper]{book}
\usepackage{amsthm,amsfonts,amssymb,amsmath}
%\usepackage{answers}
\usepackage[nosolutionfiles]{answers} 
\newif\ifsolutions
\solutionstrue 

\newtheoremstyle{foo}%
{}{}%
{}{}%
{\bfseries}{:}%
{ }%
{\thmname{#1}\thmnumber{ \textcolor{blue}{#2.}}\thmnote{ (#3)}}


\theoremstyle{foo}



\newtheorem{ex}{%
	\hyperlink{ex:\theex}{Exercise}%
	\hypertarget{sol:\theex}{}}[chapter]
\Newassociation{sol}{Soln}{ans}
\renewenvironment{Soln}[1]{\par\bigskip\noindent{\bfseries \hypertarget{ex:#1}{}%
		\hyperlink{sol:#1}{ #1}}\quad}

\usepackage[linkcolor=blue,colorlinks=true,unicode,bookmarksnumbered]{hyperref}
\begin{document}
	\chapter{Try}
	\Opensolutionfile{ans}[ans1]
	\begin{ex}[Quack]
		First exercise
		\begin{sol}
			First solution.
		\end{sol}
	\end{ex}
	\clearpage
	\begin{ex}
		Second exercise
		\begin{sol}
			Second solution.
		\end{sol}
	\end{ex}
	\clearpage
	
	\Closesolutionfile{ans}
	\ifsolutions
	\section{Solutions}
	\input{ans1}
	\fi
\end{document}   

```

After Exercise 1.1 is 1.1. How to change 1.1 into Solution like this
![image.png](/image?hash=b75df8e00bd185d0515fa6b6864c406b948ad5ec380f1c71c35753ebb1dad18f)

and 

I do not want to show solutions like this
![image.png](/image?hash=0e4621a966d265a26ed00cd697c657cdc6a16a77ac77158f07d1a9f9291717e4)
Top Answer
samcarter
The appearance of the solution is defined in the `Soln` environment in your code. To add the word "Solution", you can modify it like this:

```
\renewenvironment{Soln}[1]{%
  \par\bigskip\noindent%
  {%
    \bfseries%
    \hypertarget{ex:#1}{}%
	\hyperlink{sol:#1}{Solution}%
  }%
  \quad%
}
```

To control the position of the solution (below the exercise or at the end of the document), you can toggle on/off the `nosolutionfiles` package option and show the solutions at the end depending on this option:

```
\documentclass[12pt,a4paper]{book}
\usepackage{amsthm,amsfonts,amssymb,amsmath}
\usepackage[
%  nosolutionfiles % comment or uncomment thus line
]{answers} 

\newtheoremstyle{foo}%
{}{}%
{}{}%
{\bfseries}{:}%
{ }%
{\thmname{#1}\thmnumber{ \textcolor{blue}{#2.}}\thmnote{ (#3)}}


\theoremstyle{foo}



\newtheorem{ex}{%
	\hyperlink{ex:\theex}{Exercise}%
	\hypertarget{sol:\theex}{}}[chapter]
\Newassociation{sol}{Soln}{ans}
\renewenvironment{Soln}[1]{\par\bigskip\noindent{\bfseries \hypertarget{ex:#1}{}%
		\hyperlink{sol:#1}{%
    \ifanswerfiles
     #1
    \else
    Solution
    \fi}}\quad}


\usepackage[linkcolor=blue,colorlinks=true,unicode,bookmarksnumbered]{hyperref}
\begin{document}
	\chapter{Try}
	\Opensolutionfile{ans}[ans1]
	\begin{ex}[Quack]
		First exercise
		\begin{sol}
			First solution.
		\end{sol}
	\end{ex}
	\clearpage
	\begin{ex}
		Second exercise
		\begin{sol}
			Second solution.
		\end{sol}
	\end{ex}
	\clearpage
	
	\Closesolutionfile{ans}
  \ifanswerfiles
	\section{Solutions}
	\input{ans1}
	\fi
\end{document}   
```
![Screenshot 2022-01-10 at 10.25.17.png](/image?hash=2b5511d28be4436045899caf0fe2ad19ad4e33dc528eae2d68422fc9dfc1b7e8)

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