# Program for scalar multiplication of a matrix

Given a matrix and a scalar element k, our task is to find out the scalar product of that matrix.

Examples:

```Input : mat[][] = {{2, 3}
{5, 4}}
k = 5
Output : 10 15
25 20
We multiply 5 with every element.

Input : 1 2 3
4 5 6
7 8 9
k = 4
Output :  4 8  12
16 20 24
28 32 36 ```

The scalar multiplication of a number k(scalar), multiply it on every entry in the matrix. and a matrix A is the matrix kA.

## C

 `// C program to find the scalar product` `// of a matrix` `#include `   `// Size of given matrix` `#define N 3`   `void` `scalarProductMat(``int` `mat[][N], ``int` `k)` `{` `    ``// scalar element is multiplied by the matrix` `    ``for` `(``int` `i = 0; i < N; i++)` `        ``for` `(``int` `j = 0; j < N; j++)` `            ``mat[i][j] = mat[i][j] * k;    ` `}`   `// Driver code` `int` `main()` `{` `    ``int` `mat[N][N] = { { 1, 2, 3 },` `                    ``{ 4, 5, 6 },` `                    ``{ 7, 8, 9 } };` `    ``int` `k = 4;`   `    ``scalarProductMat(mat, k);`   `    ``// to display the resultant matrix` `    ``printf``(``"Scalar Product Matrix is : \n"``);` `    ``for` `(``int` `i = 0; i < N; i++) {` `        ``for` `(``int` `j = 0; j < N; j++)` `            ``printf``(``"%d "``, mat[i][j]);` `        ``printf``(``"\n"``);` `    ``}`   `    ``return` `0;` `}`

## C++

 `// C++ program to find the scalar product` `// of a matrix` `#include ` `using` `namespace` `std;`   `// Size of given matrix` `#define N 3`   `void` `scalarProductMat(``int` `mat[][N], ``int` `k)` `{` `    ``// scalar element is multiplied by the matrix` `    ``for` `(``int` `i = 0; i < N; i++)` `        ``for` `(``int` `j = 0; j < N; j++)` `            ``mat[i][j] = mat[i][j] * k;` `}`   `// Driver code` `int` `main()` `{` `    ``int` `mat[N][N]` `        ``= { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 } };` `    ``int` `k = 4;`   `    ``scalarProductMat(mat, k);`   `    ``// to display the resultant matrix` `    ``printf``(``"Scalar Product Matrix is : \n"``);` `    ``for` `(``int` `i = 0; i < N; i++) {` `        ``for` `(``int` `j = 0; j < N; j++)` `            ``cout<< mat[i][j]<<``" "``;` `        ``cout << endl;` `    ``}`   `    ``return` `0;` `}`

## Java

 `// Java program to find` `// the scalar product ` `// of a matrix` `import` `java.io.*;`   `class` `GFG {` `    `  `static` `final` `int` `N = ``3``;` `static` `void` `scalarProductMat(``int` `mat[][], ` `                                  ``int` `k)` `{` `    `  `    ``// scalar element is multiplied` `    ``// by the matrix` `    ``for` `(``int` `i = ``0``; i < N; i++) ` `        ``for` `(``int` `j = ``0``; j < N; j++) ` `            ``mat[i][j] = mat[i][j] * k; ` `}`   `// Driver code` `public` `static` `void` `main (String[] args)` `{` `    ``int` `mat[][] = { { ``1``, ``2``, ``3` `},` `                    ``{ ``4``, ``5``, ``6` `},` `                    ``{ ``7``, ``8``, ``9` `} };` `    ``int` `k = ``4``;`   `    ``scalarProductMat(mat, k);`   `    ``// to display the resultant matrix` `    ``System.out.println(``"Scalar Product Matrix is : "``);` `    `  `    ``for` `(``int` `i = ``0``; i < N; i++)` `    ``{` `        ``for` `(``int` `j = ``0``; j < N; j++) ` `            ``System.out.print(mat[i][j] + ``" "``);` `        ``System.out.println();` `    ``}` `}` `}`   `// This code is contributed by Ajit.`

## Python 3

 `# Python 3 program to find the scalar ` `# product of a matrix`   `# Size of given matrix` `N ``=` `3`   `def` `scalarProductMat( mat, k):`   `    ``# scalar element is multiplied ` `    ``# by the matrix` `    ``for` `i ``in` `range``( N):` `        ``for` `j ``in` `range``( N): ` `            ``mat[i][j] ``=` `mat[i][j] ``*` `k     `   `# Driver code` `if` `__name__ ``=``=` `"__main__"``:` `    `  `    ``mat ``=` `[[ ``1``, ``2``, ``3` `],` `           ``[ ``4``, ``5``, ``6` `],` `           ``[ ``7``, ``8``, ``9` `]]` `    ``k ``=` `4`   `    ``scalarProductMat(mat, k)`   `    ``# to display the resultant matrix` `    ``print``(``"Scalar Product Matrix is : "``)` `    ``for` `i ``in` `range``(N):` `        ``for` `j ``in` `range``(N):` `            ``print``(mat[i][j], end ``=` `" "``)` `        ``print``()`   `# This code is contributed by ita_c`

## C#

 `// C# program to find` `// the scalar product ` `// of a matrix` `using` `System;`   `class` `GFG{`   `static` `int` `N = 3;` `static` `void` `scalarProductMat(``int``[,] mat, ` `                                  ``int` `k)` `{` `    `  `    ``// scalar element is multiplied ` `    ``// by the matrix` `    ``for` `(``int` `i = 0; i < N; i++) ` `        ``for` `(``int` `j = 0; j < N; j++) ` `            ``mat[i,j] = mat[i, j] * k;     ` `}`   `// Driver code` `static` `public` `void` `Main ()` `{` `    ``int``[,] mat = {{1, 2, 3},` `                  ``{4, 5, 6},` `                  ``{7, 8, 9}};` `    ``int` `k = 4;`   `    ``scalarProductMat(mat, k);`   `    ``// to display the resultant matrix` `    ``Console.WriteLine(``"Scalar Product Matrix is : "``);` `    `  `    ``for` `(``int` `i = 0; i < N; i++) {` `        ``for` `(``int` `j = 0; j < N; j++) ` `            ``Console.Write(mat[i, j] + ``" "``);` `        ``Console.WriteLine();` `    ``}` `}` `}`   `// This code is contributed by Ajit.`

## PHP

 `

## Javascript

 ``

Output:

```Scalar Product Matrix is :
4 8 12
16 20 24
28 32 36```

Time Complexity: O(n2),

Auxiliary Space: O(1), since no extra space has been taken.

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