Java Program to Add two Matrices
Given two matrices A and B of same size, the task to add them in Java.
Examples:
Input: A[][] = {{1, 2},
{3, 4}}
B[][] = {{1, 1},
{1, 1}}
Output: {{2, 3},
{4, 5}}
Input: A[][] = {{2, 4},
{3, 4}}
B[][] = {{1, 2},
{1, 3}}
Output: {{3, 6},
{4, 7}}
Approach:
- Take the two matrices to be added
- Create a new Matrix to store the sum of the two matrices
- Traverse each element of the two matrices and add them. Store this sum in the new matrix at the corresponding index.
- Print the final new matrix
Below is the implementation of the above approach:
Java
// Java program for addition of two matricesimport java.io.*;class GFG { // Function to print Matrix static void printMatrix(int M[][], int rowSize, int colSize) { for (int i = 0; i < rowSize; i++) { for (int j = 0; j < colSize; j++) System.out.print(M[i][j] + " "); System.out.println(); } } // Function to add the two matrices // and store in matrix C static int[][] add(int A[][], int B[][], int size) { int i, j; int C[][] = new int[size][size]; for (i = 0; i < size; i++) for (j = 0; j < size; j++) C[i][j] = A[i][j] + B[i][j]; return C; } // Driver code public static void main(String[] args) { int size = 4; int A[][] = { { 1, 1, 1, 1 }, { 2, 2, 2, 2 }, { 3, 3, 3, 3 }, { 4, 4, 4, 4 } }; // Print the matrices A System.out.println("\nMatrix A:"); printMatrix(A, size, size); int B[][] = { { 1, 1, 1, 1 }, { 2, 2, 2, 2 }, { 3, 3, 3, 3 }, { 4, 4, 4, 4 } }; // Print the matrices B System.out.println("\nMatrix B:"); printMatrix(B, size, size); // Add the two matrices int C[][] = add(A, B, size); // Print the result System.out.println("\nResultant Matrix:"); printMatrix(C, size, size); }} |
Output:
Matrix A: 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 Matrix B: 1 1 1 1 2 2 2 2 3 3 3 3 4 4 4 4 Resultant Matrix: 2 2 2 2 4 4 4 4 6 6 6 6 8 8 8 8
Time Complexity: O(N2), where N is the row or column number of the matrix
Auxiliary Space: O(N2)
