A matrix is an ordered rectangular array of numbers or functions. The numbers or functions are called the elements or the entries of the matrix.
eg a 2X2 Matrix is as follows:
In the above matrix, the horizontal line of elements is called rows and vertical line of elements is called columns. The above matrix thus has 2 rows and 2 columns
1.1 Order of Matrix
A matrix having m rows and n columns is called a matrix of order m × n or simply m × n matrix.
eg in the matrix given as follows:
The order of above matrix is 2 X 3, since it has m=2(rows) and n=3(columns)