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2.6.1: array

column 1 entry & column 2 entry ... & column n entry \\

Math arrays are produced with the array environment. It has a single mandatory argument describing the number of columns and the alignment within them. Each column, coln, is specified by a single letter that tells how items in that row should be formatted.

Column entries must be separated by an &. Column entries may include other LaTeX commands. Each row of the array must be terminated with the string \\.

Note that the array environment can only be used in math mode, so normally it is used inside an equation environment.