Array (LaTeX environment)

The array environment is used to make a table of information, with column alignment (left, center, or right) and optional vertical lines separating the columns.

\begin{array}{col1col2…coln}
item11 & item12 … & item1n\\
item21 & item22 … & item2n\\


...

itemn1 & itemn2 … & itemnn\\
\end{array}


Each of col1, col2, etc. is a single letter,

c - for centred

l - for flush left

r - for flush right

The column format letters can be interspersed with vertical bars (|), which result in rendering vertical bars as needed in the formatted matrix.

If a horizontal line is needed in the matrix, \hline can be used.

Within the array itself, columns are separated by an &, and each row ends with a double backslash, \\.

LaTeX markup...	...results in:	...is used for:
\begin{array}{|l|cr} left1 & center1 & right1\\ \hline d & e & f \end{array}	${\begin{array}{|l|cr}left1&center1&right1\\\hline d&e&f\end{array}}$	array. |l|cr means left-align, center, and right align columns; vertical bars before and after first column. \hline draws a horizontal line.
\begin{array}{lcl} z & = & a \\ & = & a \\ f(x,y,z) & = & x + y + z \end{array}	$\begin{array}{lcl} z & = & a \\ & = & a \\ f(x,y,z) & = & x + y + z \end{array}$	using an array to align equations