How to insert manual line breaks inside LaTeX tables?

I know that if you define a width in a table's column, you can get automatic word-wrapping. However, I need to control where newline开发者_开发技巧s should happen in a specific table cell.

Thus, how can I insert manual line breaks in a LaTeX table cell?

Usually, you use a column definition like p{3cm} instead of l, and then use \newline instead of \\ in the cell body.

You could do it like this:

\documentclass{report}

\begin{document}

\begin{tabular}{|l|l|}
  \hline
  A & B \\ 
    & C \\ 
  \hline
  D & E \\
  \hline
\end{tabular}

\end{document}

which produces:

The command \shortstack can be used to wrap cell content and use \\ inside it:

\begin{tabular}{|l|l|}
\hline
one line & \shortstack{two\\ lines} \\
\hline
XX & YYY \\
\hline
\end{tabular}

EDIT: however I just realised that interline spacing might differ between your columns. So it's not the prettiest solution.

It can be achieved by using \newline. Since, the accepted answer did not have any sample snippet, a working sample is provided here:

 \begin{tabular}{p{2cm} p{10cm}}
    \em{Programming} \textsc{languages} & Java, Node.js, Python, Clojure \\
    \newline & \newline \\
    \em{Development systems} & Concurrent Programming, Design Patterns 
 \end{tabular}

You can do like Bart suggested above and combine with multirow to centralize single line texts.

\begin{table}[h]
    \centering
    \caption{Optimized models (Softmax) final results with confidence intervals.}
        \begin{tabular}{|c|c|c|c|c|}
        \hline
         \multirow{2}*{Architecture} & Batch & N. & Learning & \multirow{2}*{Micro-F1} \\
          & size & epochs & rate &  \\
         \hline
         ResNet50& 64 & 60 & $5\times10^{-3}$ & $(\textbf{0.7683} \pm 0.0223)$ \\
         \hline
         ResNet152\_V2& 64 & 40 & $5\times10^{-4}$ & $(0.6698 \pm 0.0467)$\\
         \hline
    \end{tabular}
\label{final_result_softmax}
\end{table}

Yields:

\newline works to break a line within a cell in tabularx environment.