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abhilash

In this shot I will explain what to do if you are given two matrices and must add the two matrices. The resulting matrix should have the sum of the corresponding elements of the two matrices.

- Matrix 1

```
[[1, 2, 3],
[4, 5, 6]
[7, 8, 9]]
```

- Matrix 2

```
[[10, 20, 30],
[40, 50, 60]
[70, 80, 90]]
```

Matrix 1 + Matrix 2 =

```
[[11, 22, 33],
[44, 55, 66]
[77, 88, 99]]
```

The mandatory condition for adding two matrices is that the

dimensionof the two matricesshould be the same.

Adding two matrices means adding their corresponding elements. We can use a `for`

loop where we access the corresponding elements of the matrices and place the sum of the elements at the relevant positions in the new resultant matrix.

The `Pseudo-Code`

of the algorithm is as follows:

```
for i from 0 to numRows:
for j from 0 to numCols:
sumMatrix[i][j] = matrix1[i][j] + matrix2[i][j]
```

import java.util.Arrays; public class Main { private static int[][] add(int numRows, int numCols, int[][] matrix1, int[][] matrix2) { int[][] sumMatrix = new int[numRows][numCols]; for(int i=0;i < numRows; i++){ for(int j=0; j < numCols; j++) sumMatrix[i][j] = matrix1[i][j] + matrix2[i][j]; } return sumMatrix; } private static void printMatrix(int[][] matrix){ for(int[] row: matrix) System.out.println(Arrays.toString(row)); } public static void main(String[] args) { int[][] matrix1 = { {1, 2, 3}, {4, 5, 6}, {7, 8, 9} }; int[][] matrix2 = { {10, 20, 30}, {40, 50, 60}, {70, 80, 90} }; int numRows = 3; int numCols = 3; int[][] result = add(numRows, numCols, matrix1, matrix2); System.out.println("Sum Matrix is: "); printMatrix(result); } }

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matrix

data structures

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java

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abhilash

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