A horizontal line of elements in a matrix is called row of a matrix.
The space inside a matrix is divided as number of rows to place elements equally in each row. Every two elements in a row is separated by equal space.
Similarly, an equal space between every two rows in a matrix is maintained to avoid mixing elements of every two rows.
-4 & 1 & 0 & 9 \\
7 & 3 & -8 & 5\\
2 & -5 & 1 & 0\\
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