\indent & \noindent ¶Synopsis:
\indent
or
\noindent
Go into horizontal mode (see Modes). The \indent command
first outputs an empty box whose width is \parindent. These
commands are robust (see \protect).
Ordinarily you create a new paragraph by putting in a blank line.
See \par, for the difference between this command and \par. To
start a paragraph without an indent, or to continue an interrupted
paragraph, use \noindent.
In the middle of a paragraph the \noindent command has no effect,
because LaTeX is already in horizontal mode there. The
\indent command’s only effect is to output a space.
This example starts a fresh paragraph.
... end of the prior paragraph. \noindent This paragraph is not indented.
and this continues an interrupted paragraph.
The data
\begin{center}
\begin{tabular}{rl} ... \end{tabular}
\end{center}
\noindent shows this clearly.
To omit indentation in the entire document put
\setlength{\parindent}{0pt} in the preamble. If you do that,
you may want to also set the length of spaces between paragraphs,
\parskip (see \parindent & \parskip).
Default LaTeX styles have the first paragraph after a section that is
not indented, as is traditional typesetting in English. To change that,
look on CTAN for the package indentfirst.