The MAT statement lets you implicitly create  and  manipulate  one-  and
  two-dimensional  arrays.  You can use the MAT statement to assign values
  to array elements, or to redimension  a  previously  dimensioned  array.
  You   can   also   perform   matrix   arithmetic   operations   such  as
  multiplication, addition, and subtraction, and other  matrix  operations
  such as transposing and inverting matrices.

  Examples:

  MAT First_array = ZER
  MAT String_array = NUL$
  MAT A = B + C
  MAT C = (55.2) * First_array

1  –  Syntax

  Initialization (Numeric):

                      { CON }
      MAT num-array = { IDN } [ ( int-exp1 [, int-exp2 ] ) ]
                      { ZER }

  Initialization (String):

      MAT str-array = NUL$ [ ( int-exp1 [, int-exp2 ] ) ]

  Array Arithmetic:

                                  [ { + }            ]
      MAT num-array1 = num-array2 [ { - } num-array3 ]
                                  [ { * }            ]

      MAT num-array1 = num-array2 * num-array3 [* num-array4] ,...

  Scalar Multiplication:

      MAT num-array4 = ( num-exp ) * num-array5

  Inversion and Transposition:

                       { TRN }
      MAT num-array6 = { INV } ( num-array7 )

2  –  INPUT

  The  MAT  INPUT  statement  assigns  values   from   a   terminal   or
  terminal-format file to array elements.

  Example

  MAT INPUT Emp_name$(10,10)

2.1  –  Syntax

      MAT INPUT [ chnl-exp, ] { array [ (int-exp1 [,int-exp2]) ] },...

3  –  LINPUT

  The MAT LINPUT statement receives  string  data  from  a  terminal  or
  terminal-format file and assigns it to string array elements.

  Example

  MAT LINPUT Time_card$(10%)

3.1  –  Syntax

      MAT LINPUT [chnl-exp,] {  str-array  [  (int-exp1  [,int-exp2])  ]
      },...

4  –  PRINT

  The  MAT  PRINT  statement  prints  the  contents   of   a   one-   or
  two-dimensional  array  on  your terminal or assigns the value of each
  array element to a record in a terminal-format file.

  Example

  MAT PRINT Arr1(5,5)

4.1  –  Syntax

      MAT PRINT [chnl-exp,] {array [(int-exp1 [,int-exp2])] [{ , }]}...
                                                             { ; }

5  –  READ

  The MAT READ statement assigns values from DATA  statements  to  array
  elements.

  Example

  MAT READ Animal$(2,2)
  DATA CAT,DOG,GOAT,RABBIT

5.1  –  Syntax

      MAT READ { array [ ( int-exp1 [, int-exp2 ] ) ] },...