General ⇒ Show text if...

[gundegutt]

Hi,

I use LaTex to do my assignments at uni, and want to make a if-statement that will either activate or de-activate a paragraph. I have used \newtheorem to make a {problem} environment which shows the problem as given in the assignment, but want to be able to hide this when I print out the assignment.

My plan is to create a counter:

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\newcounter{ShowProblem} 
\addtocounter{ShowProblem}{1} %Show problems if value == 1

and then use an if-statement to either display or hide a text.

Pseudocode:

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if ShowProblem == 1
\begin{problem}
bla..bla..bla
\end{problem}
end if

I've read some tutorials on the if-then environment, but are unable to get it working. Any other suggestions?

[gmedina]

Hi,

try the features offered by the comment package.

[magicmoose]

Or with ifthen, depending how you set up you problem environment/command

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\newcommand{\showproblems}{1}% set to 0 to hide problems

and then

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\ifthenelse{\equal{\showproblems}{1}}{true}{false}

For example,

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\newcommand{\problem}[1]{\ifthenelse{\equal{\showproblems}{1}}{#1}{}}

(although this is untested...)

[gundegutt]

Thanks,

But could you please make your example a bit bigger? I didn't quite understand how to implement it..

Cheers

[magicmoose]

Can you show us your code so we can see how you are currently doing your problems and give you a solution that will work how you want it.

[gundegutt]

Can you show us your code so we can see how you are currently doing your problems and give you a solution that will work how you want it.

That would be excellent!

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\newtheorem{problem}{Problem}

if (showProblem == true)
  then{
       \begin{problem}
          Description of the problem given in the assignment
       \end{problem}
       }
endif

The if-then part is pseudocode, but illustrates what I want to achieve.

[frabjous]

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\documentclass{article}

\usepackage{ifthen}

\newtheorem{problem}{Problem}
\newcommand{\showproblems}{1}% set to 0 to hide problems

\begin{document}

\noindent Here is some text so that something is always produced.

\ifthenelse{\equal{\showproblems}{1}}{
   \begin{problem}
  Description of the problem given in the assignment
   \end{problem}
}%
{}% if not set to 1
\end{document}

Magicmoose was also pointing in the direction of including the conditional in the definition of a \problem command so that you would not have to include the conditional every time. Perhaps the above is enough to see how that might work.

[gmedina]

An example using my initial suggestion:

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\documentclass{book}
\usepackage{comment}

\newtheorem{problem}{Problem}

\includecomment{comment}

\begin{document}

\noindent Here is some text so that something is always produced.

\begin{comment}
\begin{problem}
  Description of the problem given in the assignment.
\end{problem}
\end{comment}

\end{document}

comment out the line \includecomment{comment} to hide the contents of the problem environment.

[gundegutt]

Thanks for all help, gmedias solution was rather easy to implement so I went for the comment package.

I might have use for the other suggestions as well, if I want to hide different sections for instance.

Thanks

[gmedina]

With the comment package you can define different kinds of comments and include/exclude them at will:

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\documentclass{book}
\usepackage{comment}

\newtheorem{problem}{Problem}
\newtheorem{solution}{Solution}

\includecomment{commentp}
\excludecomment{comments}

\begin{document}

\noindent Here is some text so that something is always produced.

\begin{commentp}
\begin{problem}
  Description of the problem given in the assignment.
\end{problem}
\end{commentp}

Some more text

\begin{comments}
\begin{solution}
  Description of the solution to problem given in the assignment.
\end{solution}
\end{comments}

\end{document}