Difference between revisions of "LaTeX/C3/newenvironment-in-LaTeX/English"

• create or define new environments to get customized output.
• redefine the existing environments.

1. You should have knowledge of commands that are necessary to create a document in LaTeX.
2. You should also have knowledge of compiling and producing a PDF output in LaTeX.
3. If not, please go through the relevant LaTeX spoken tutorials on this website.

• Ubuntu Linux 14.04 operating system
• TeXWorks 0.5

As the name suggests the command newenvironment is used to create/define a new environment.

It is used to format blocks of text, generally.

Ensure that the custom environment you create, is not an already existing LaTeX environment.

\newenvironment{environment name}{start commands}{end commands}

Here the start commands are executed whenever the environment starts.

And end commands are executed whenever the environment ends.

Download and unzip the files provided in the Code Files link below the player.

code given in the file newEnv.tex

\documentclass{article}

\usepackage{color}

\newenvironment{bluetext}

{\begin{center}\color{blue}}

{\end{center}}

\begin{document}

This text is outside the new environment. This text is outside the new environment.

This text is outside the new environment.

\begin{bluetext}

Testing to see whether this text is in blue colour.

\end{bluetext}

some more text

\end{document}

means that we are defining a new environment called bluetext.

{\begin{center}\color{blue}}

{\end{center}}

While using it, we just give \begin{bluetext} and \end{bluetext} with the intended text between the two.

Observe the blue text in the output.

\newenvironment{environment name}[parameters]{start commands}{end commands}

\documentclass{article}

\usepackage{color}

\newenvironment{bluetext}[1]

{\begin{center}\color{blue}

\textbf{\textit{#1}}\\[12pt]

}

{\end{center}}

\begin{document}

This text is outside the new environment. This text is outside the new environment.

This text is outside the new environment.

\begin{bluetext}{My text in blue}

Testing to see whether this text is in blue colour.

\end{bluetext}

some more text

\end{document}

and paste it into our new teX file.

Here in the given code, we are adding a title to the blue text by getting the title as an input parameter.

\textbf{\textit{#1}}\\[12pt]

to the code given for the environment without parameter

• We use it as “\begin{bluetext}{My text in blue}”
• and the text,
• and then “\end{bluetext}”

The syntax for renewenvironment is

\renewenvironment{env}{start commands}{end commands}

It’s quite similar to newenvironment.

\documentclass{article}

\renewenvironment{itemize}{\begin{center}\large }{\end{center}}

\begin{document}

This text is outside the new environment. This text is outside the new environment.

This text is outside the new environment.

\begin{itemize}

Text inside itemize

Lets check the output

\end{itemize}

\end{document}

\renewenvironment{itemize} redefines the itemize environment.

It is defined as {\begin{center}\large} and {\end{center}}

This means that the text should be centered and made to large size.

The text given within \begin{itemize} and \end{itemize} should be

• converted to large size
• and centered according to our definition

• newenvironment
• newenvironment with parameters
• renewenvironment

which takes the color (red, blue, yellow, green) as input

and creates a list in that color.

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