Write a C program to read elements in a matrix and find the sum of elements of each row and columns of matrix. C program to calculate sum of rows and columns of matrix. Logic to find sum of each row and columns of a matrix in C programming.

**Example**

**Input**

Input elements in array: 1 2 3 4 5 6 7 8 9

**Output**

Sum of row 1 = 6 Sum of row 2 = 15 ... ... Sum of column 3 = 18

## Required knowledge

Basic C programming, For loop, Array

Must know –

Sum of rows and columns of a matrix is defined as –

## Program to find sum of rows and columns of matrix

```
/**
* C program to find sum of elements of rows and columns of matrix
*/
#include <stdio.h>
#define SIZE 3 // Matrix size
int main()
{
int A[SIZE][SIZE];
int row, col, sum = 0;
/* Input elements in matrix from user */
printf("Enter elements in matrix of size %dx%d: \n", SIZE, SIZE);
for(row=0; row<SIZE; row++)
{
for(col=0; col<SIZE; col++)
{
scanf("%d", &A[row][col]);
}
}
/* Calculate sum of elements of each row of matrix */
for(row=0; row<SIZE; row++)
{
sum = 0;
for(col=0; col<SIZE; col++)
{
sum += A[row][col];
}
printf("Sum of elements of Row %d = %d\n", row+1, sum);
}
/* Find sum of elements of each columns of matrix */
for(row=0; row<SIZE; row++)
{
sum = 0;
for(col=0; col<SIZE; col++)
{
sum += A[col][row];
}
printf("Sum of elements of Column %d = %d\n", row+1, sum);
}
return 0;
}
```

Output

Enter elements in matrix of size 3x3:

1 2 3

4 5 6

7 8 9

Sum of elements of Row 1 = 6

Sum of elements of Row 2 = 15

Sum of elements of Row 3 = 24

Sum of elements of Column 1 = 12

Sum of elements of Column 2 = 15

Sum of elements of Column 3 = 18

Happy coding ;)