# C program to add two matrices

Write a C program to read elements in two matrices and add elements of both matrices. C program for addition of two matrix. Matrix addition program in C. Logic to add two matrix in C programming.

Example

Input

```Input elements in 3x3 matrix1:
1 2 3
4 5 6
7 8 9
Input elements in 3x3 matrix2:
9 8 7
6 5 4
3 2 1
```

Output

```Sum of both matrix =
10 10 10
10 10 10
10 10 10```

## Required knowledge

Basic C programming, For loop, Array

Matrix addition is done element wise (entry wise) i.e. Sum of two matrices A and B of size mXn is defined by
(A + B) = Aij + Bij (Where `1 ≤ i ≤ m` and `1 ≤ j ≤ n`) ## Program to add two matrices

``````/**
* C program to find sum of two matrices of size 3x3
*/

#include <stdio.h>

#define SIZE 3 // Size of the matrix

int main()
{
int A[SIZE][SIZE]; // Matrix 1
int B[SIZE][SIZE]; // Matrix 2
int C[SIZE][SIZE]; // Resultant matrix

int row, col;

/* Input elements in first matrix*/
printf("Enter elements in matrix A of size 3x3: \n");
for(row=0; row<SIZE; row++)
{
for(col=0; col<SIZE; col++)
{
scanf("%d", &A[row][col]);
}
}

/* Input elements in second matrix */
printf("\nEnter elements in matrix B of size 3x3: \n");
for(row=0; row<SIZE; row++)
{
for(col=0; col<SIZE; col++)
{
scanf("%d", &B[row][col]);
}
}

/*
* Add both matrices A and B entry wise or element wise
* and stores result in matrix C
*/
for(row=0; row<SIZE; row++)
{
for(col=0; col<SIZE; col++)
{
/* Cij = Aij + Bij */
C[row][col] = A[row][col] + B[row][col];
}
}

/* Print the value of resultant matrix C */
printf("\nSum of matrices A+B = \n");
for(row=0; row<SIZE; row++)
{
for(col=0; col<SIZE; col++)
{
printf("%d ", C[row][col]);
}
printf("\n");
}

return 0;
}``````

Output

```Enter elements in matrix A of size 3x3:
1 2 3
4 5 6
7 8 9

Enter elements in matrix B of size 3x3:
9 8 7
6 5 4
3 2 1

Sum of matrices A+B =
10 10 10
10 10 10
10 10 10```

Happy coding 😉 