# C program to perform Scalar matrix multiplication

Write a C program to read elements in a matrix and perform scalar multiplication of matrix. C program for scalar multiplication of matrix. How to perform scalar matrix multiplication in C programming. Logic to perform scalar matrix multiplication in C program.

Example

Input

```Input elements of matrix A:
1 2 3
4 5 6
7 8 9
Input multiplier: 2
```

Output

```2  4  6
8 10 12
14 16 18```

## Required knowledge

Basic C programming, For loop, Array

### Scalar multiplication of matrix

Scalar multiplication of matrix is the simplest and easiest way to multiply matrix. Scalar multiplication of matrix is defined by -
(cA)ij = c . Aij (Where 1 ≤ i ≤ m and 1 ≤ j ≤ n)

Read more - Program to multiply two matrices

## Program to perform scalar matrix multiplication

``````/**
* C program to perform scalar matrix multiplication
*/

#include <stdio.h>

#define SIZE 3 // Maximum size of the array

int main()
{
int A[SIZE][SIZE];
int num, row, col;

/* 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]);
}
}

/* Input multiplier from user */
printf("Enter any number to multiply with matrix A: ");
scanf("%d", &num);

/* Perform scalar multiplication of matrix */
for(row=0; row<SIZE; row++)
{
for(col=0; col<SIZE; col++)
{
/* (cAij) = c . Aij */
A[row][col] = num * A[row][col];
}
}

/* Print result of scalar multiplication of matrix */
printf("\nResultant matrix c.A = \n");
for(row=0; row<SIZE; row++)
{
for(col=0; col<SIZE; col++)
{
printf("%d ", A[row][col]);
}
printf("\n");
}

return 0;
}``````

Output

```Enter elements in matrix of size 3x3:
1 2 3
4 5 6
7 8 9
Enter any number to multiply with matrix A: 2

Resultant matrix c.A =
2  4  6
8 10 12
14 16 18```

Happy coding 😉