# Multiplication of two matrix in kotlin

Kotlin program for Multiplication of two matrix. Here mentioned other language solution.

``````/*
Kotlin program for
Two matrix multiplication
*/
class Multiply
{
companion object
{
// Display the element of given 2d matrix
fun printRecord(matrix: Array < Array < Int >> ): Unit
{
println("  --------------");
// Assume  N x N Matrix size
val row: Int = matrix.count();
val col: Int = matrix[0].count();
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();
}
fun multiplication(a: Array < Array < Int >> ,
b: Array < Array < Int >> ): Unit
{
// Get the size
val row: Int = a.count();
val col: Int = a[0].count();
// This matrix are store the result of multiplication
var result: Array < Array < Int >> = Array(row)
{
Array(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
Multiply.printRecord(a);
println("  Matrix B");
// Print element of matrix y
Multiply.printRecord(b);
println("  Matrix [(A) x (B)]");
// Display resultant matrix
Multiply.printRecord(result);
}
}
}
fun main(args: Array < String > ): Unit
{
// Define matrix A
val a: Array < Array < Int >> = arrayOf(
arrayOf(1, 2, 3),
arrayOf(6, 1, 2),
arrayOf(5, 4, 3)
);
// Define matrix B
val b: Array < Array < Int >> = arrayOf(
arrayOf(3, 1, 3),
arrayOf(1, 1, 2),
arrayOf(2, 2, 3)
);
Multiply.multiplication(a, b);
}``````

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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