Table/array/tabularray

We need an example of both 

tabular
```
\begin{center}
\begin{tabular{ccc}
something & something else & something again\\
something & something else & something again\\
\end{center}
```
and array
```
\[
\begin{array}{ccc}
1 & 2 & 3\\
4 & 5 & 6
\end{array}
\]
```