# How to Write WAP in C for Matrix Multiplication

We have seen a few different ways in which we can perform matrix multiplication in C. Some examples include Scalar and Two-matrix multiplication. In this article, we will talk about another method: a recursive one.

## Recursive approach

Matrix multiplication is a key kernel in many linear algebra algorithms. It can be used to create a new matrix by multiplying two or more matrices. This article provides a detailed overview of a recursive approach to matrix multiplication in C.

The standard technique involves iterating over an array and calculating matrices for each iteration. However, the array used is inefficient.

One option for improving memory locality is to implement a reordering scheme. By reordering, the matrices are kept in contiguous memory blocks. Another option is to parenthesize the matrices, which can dramatically impact the cost of evaluating the product.

A recursive algorithm reduces the number of steps required to compute the final result. However, it is important to note that the recursive order does not eliminate recursive overhead. As a result, recursive orderings do not address locality issues.

To apply a recursive ordering to a recursive algorithm, a reordering method must be implemented. For the recursive algorithm, this requires reordering values for the initial inputs and the final output. Reordering is done twice for each iteration.

## Two-matrices multiplication

A matrix is a two-dimensional array of numbers that represents structured data in a graphical format. They are used in programming languages such as C to solve linear equations, display graphics, or store and retrieve data. You can write a program to multipy two matrices in C.

For this to work you must have a for loop. The loop will iterate over each row and column of the first matrix and feed values into the second matrix. Once the process has been completed the output will be displayed on the screen. Similarly, you will have to use a scanf function to input elements of the matrices one by one.

The program will ask you to enter the number of columns and rows of each matrix. Next, it will ask you to select the order for the matrices. Finally, you must insert an error message into the condition statement if the matrices are not compatible for the multiplication.

The first matrix can only be multiplied by the second matrix if the size of the first is equal to the size of the second. In this case, the product of the two matrices is the dot product between the rows of the first and the columns of the second.

## Examples of matrix multiplication in C

Matrix multiplication is a technique that can be used to solve linear equations. It uses a nested for loop to perform the logic. The inner for loop iterates over columns while the outer for loop iterates over rows.

To perform a matrix multiplication, you need to enter two matrices into your program. You must also declare the order of the matrices. In some programming languages, such as C, matrices can be stored as individual variables.

When you use a matrix multiplication, you must add products. These added products must be in the right positions. This is done by determining the dot product of the columns and rows of the matrices. Usually, the dot product will be the sum of the columns and rows of both matrices.

Dot product can also be used to find entries in the resulting matrix. But to do this, you need to have the same number of entries in the first and second column of the matrix.

## Scalar matrix multiplication

If you are trying to find how to write a Scalar Matrix Multiplication in C, then you are in the right place. This type of multiplication is used to solve linear equations. It is one of the most common operations for solving linear algebra problems.

The Scalar matrix multiplication function is a simple operation that uses scalar values to multiply the entries of a matrix. During this process, the scalar value is always the same for each entry of the matrix.

This process is known as the associative property. During this operation, the multiplication of two factors is performed first. When a third factor is added to the multiplication, it is multiplied by the sum of the two scalar factors. Hence, the result is a matrix of the same size as the original matrix.

Scalar matrix multiplication is commonly used in linear algebra and data science. However, it has many other applications as well. For example, it is used to solve physics problems and for transformation of coordinate systems. In addition, it is also used in computer programming.