\newline ¶In ordinary text, this ends a line in a way that does not right-justify
it, so the text before the end of line is not stretched. That is, in
paragraph mode (see Modes), the \newline command is
equivalent to double-backslash (see \\). This command is fragile
(see \protect).
However, the two commands are different inside a tabular or
array environment. In a column with a specifier producing a
paragraph box such as typically p{...}, \newline will
insert a line end inside of the column; that is, it does not break the
entire tabular row. To break the entire row use \\ or its
equivalent \tabularnewline.
This will print ‘Name:’ and ‘Address:’ as two lines in a single cell of the table.
\begin{tabular}{p{1in}@{\hspace{2in}}p{1in}}
Name: \newline Address: &Date: \\ \hline
\end{tabular}
The ‘Date:’ will be baseline-aligned with ‘Name:’.