# Multiplication of two matrix in swift

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

``````import Foundation
/*
Swift 4 program for
Two matrix multiplication
*/
class Multiply
{
// Display the element of given 2d matrix
static func printRecord(_ matrix: [[Int]])
{
print("  --------------");
// Assume  N x N Matrix size
let row: Int = matrix.count;
let 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("  " + String(matrix[i][j]), terminator: "");
j += 1;
}
print();
i += 1;
}
print();
}
static func multiplication(_ a: [[Int]], _ b: [[Int]])
{
// Get the size
let row: Int = a.count;
let col: Int = a[0].count;
// This matrix are store the result of multiplication
var result: [
[Int]
] = Array(repeating: Array(repeating: 0, count: col), count: row);
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;
}
print("  Matrix A");
// Print element of matrix x
Multiply.printRecord(a);
print("  Matrix B");
// Print element of matrix y
Multiply.printRecord(b);
print("  Matrix [(A) x (B)]");
// Display resultant matrix
Multiply.printRecord(result);
}
static func main()
{
// Define matrix A
let a: [
[Int]
] = [
[1, 2, 3],
[6, 1, 2],
[5, 4, 3]
];
// Define matrix B
let b: [
[Int]
] = [
[3, 1, 3],
[1, 1, 2],
[2, 2, 3]
];
Multiply.multiplication(a, b);
}
}
Multiply.main();``````

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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