Code added for multiplication of two matrixs

siddhant2002 · siddhant2002 · commit 0e20e062b34d · 2022-01-01T14:07:42.000+05:30
diff --git a/Programs/matrix/Matrix_Multiply.java b/Programs/matrix/Matrix_Multiply.java
@@ -0,0 +1,64 @@
+// Program to multply two matrices in Java
+package matrix;
+import java.util.Scanner;
+public class Matrix_Multiply {
+	public static void main(String[] args) {
+		try (Scanner sc = new Scanner(System.in)) {
+		System.out.println("Enter the row and column number for 1st matrix");
+			int n=sc.nextInt();
+			int m=sc.nextInt();
+			// Input for the row and column number
+			int a1[][] = new int[n][m];  
+			// New 2D array for first matrix
+			System.out.println("Enter "+(n*m)+ " numbers");
+			// Taking input of the first matrix
+			for (int i = 0; i < n; i++) {
+				for (int j = 0; j < m; j++) {
+					a1[i][j] = sc.nextInt();
+				}
+			}
+			int n1=sc.nextInt();
+			int m1=sc.nextInt();
+			// Input for the row and column number
+			int a2[][] = new int[n1][m1];  
+			// New 2D array for second matrix
+			System.out.println("Enter "+(n1*m1)+ " numbers");
+			// Taking input of the second matrix
+			for (int i = 0; i < n1; i++) {
+				for (int j = 0; j < m1; j++) {
+					a2[i][j] = sc.nextInt();
+				}
+			}
+			if(m!=n1)
+			{
+				System.out.println("Invalid coordinates of the matrix");
+				return;
+			}
+			int multiply[][] = new int[n][m1];  
+			// New 2D array for multiplication of the two matrices - 
+			System.out.println("The multiplication of two matrices are - ");
+			// Performing multiplication of two matrices - 
+			for(int i=0;i<n;i++)
+			{
+			    for(int j=0;j<m1;j++)
+			    {
+			        multiply[i][j]=0;
+			        for(int d=0;d<m;d++)
+			        {
+			            multiply[i][j]=multiply[i][j]+(a1[i][d]*a2[d][j]);
+						// multiplication method
+			        }
+			    }
+			}
+			// Displaying multiplication of two matrices - 
+			for(int i=0;i<n;i++)
+			{
+			    for(int j=0;j<m1;j++)
+			    {
+			        System.out.print(multiply[i][j]+" ");
+			    }
+			    System.out.println();
+			}
+		}
+	}
+}
