Return the matrix size of the argument.

```
size(
```*[1,2;3,4;5,6]*)

arg | The object, the size of which is to be measured. |

return value | The size of the argument. |

The argument can be any scalar, vector, or matrix. It always handles the input as a matrix: a scalar is a 1x1 matrix, a vector is a 1xN size matrix.

The size is a vector in [no. of rows, no. of colums] format.

```
size([1,2,3])[1]
```