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 –

(c**A**)_{ij} = c . **A**_{ij} (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 😉