# Multiplication of two matrix in scala

Scala program for Multiplication of two matrix. Here more solutions.

``````/*
Scala program for
Two matrix multiplication
*/
class Multiply()
{
// Display the element of given 2d matrix
def printRecord(matrix: Array[Array[Int]]): Unit = {
println("  --------------");
// Assume  N x N Matrix size
var row: Int = matrix.length;
var col: Int = matrix(0).length;
var i: Int = 0;
// Iterate the row element
while (i < row)
{
var j: Int = 0;
// Iterate the column element
while (j < col)
{
// Display element value
print("  " + matrix(i)(j));
j += 1;
}
println();
i += 1;
}
println();
}
def multiplication(a: Array[Array[Int]],
b: Array[Array[Int]]): Unit = {
// Get the size
var row: Int = a.length;
var col: Int = a(0).length;
// This matrix are store the result of multiplication
var result: Array[Array[Int]] = Array.fill[Int](row, col)(0);
var i: Int = 0;
while (i < row)
{
var j: Int = 0;
while (j < col)
{
// Set the initial value of new matrix element
result(i)(j) = 0;
var k: Int = 0;
while (k < row)
{
// Multiply matrix A [i] row and [k] columns to
// the Matrix B [k] columns and [j] rows.
result(i)(j) += a(i)(k) * b(k)(j);
k += 1;
}
j += 1;
}
i += 1;
}
println("  Matrix A");
// Print element of matrix x
printRecord(a);
println("  Matrix B");
// Print element of matrix y
printRecord(b);
println("  Matrix [(A) x (B)]");
// Display resultant matrix
printRecord(result);
}
}
object Main
{
def main(args: Array[String]): Unit = {
// Define matrix A
var a: Array[Array[Int]] = Array(
Array(1, 2, 3),
Array(6, 1, 2),
Array(5, 4, 3)
);
// Define matrix B
var b: Array[Array[Int]] = Array(
Array(3, 1, 3),
Array(1, 1, 2),
Array(2, 2, 3)
);
}
}``````

Output

``````  Matrix A
--------------
1  2  3
6  1  2
5  4  3

Matrix B
--------------
3  1  3
1  1  2
2  2  3

Matrix [(A) x (B)]
--------------
11  9  16
23  11  26
25  15  32
``````

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