# Matrix Calculator

The matrix below say

**A**has

**m**rows and

**n**columns, where m and n are called its dimensions. Then the matrix with m rows and n columns is called m-by-n matrix or $m\times n$ matrix. The entry of a matrix A in the

**i**row and

^{th}**j**

^{th}column is called the

**ij**

**or**

**(ij)**entry of A. The

^{th}**(ij)**

^{th}^{ }entry of a matrix A is written as

**a**

_{ij}or

**A[ij]**.

__Example__This matrix has $m = 4$ rows, and $n = 3$ columns.

The marix $m\times n$ is $4\times 3$ matrix.

Element

**a**or

_{32}**A[32]**is

**1**.