# Write a C Program for multiplication of two matrix using array

**Multiplication of two matrix using array**

Write a C Program for multiplication of two matrix using array. Here’s simple Program to multiply two matrix using array in C Programming Language.

*What is Matrix ?*

**Matrix representation** is a method used by a computer language to store matrices of more than one dimension in memory. C uses “Row Major”, which stores all the elements for a given row contiguously in memory.

*Two-dimensional Arrays : :*

The simplest form of multidimensional array is the two-dimensional array. A two-dimensional array is, in essence, a list of one-dimensional arrays. An m × n (read as m by n) order matrix is a set of numbers arranged in m rows and n columns.

To declare a two-dimensional integer array of size [x][y], you would write something as follows −

*type arrayName [ x ][ y ];*

Where **type** can be any valid C data type and **arrayName** will be a valid C identifier.

Below is the source code for C Program for multiplication of two matrix using array which is successfully compiled and run on Windows System to produce desired output as shown below :

**SOURCE CODE : :**

**SOURCE CODE : :**

/* C Program for multiplication of two matrix using array */ #include <stdio.h> int main() { int A[3][3], B[3][3], C[3][3]; int row, col, i, sum; /* * Reads elements in first matrix from user */ printf("Enter elements in matrix A of size 3x3: \n"); for(row=0; row<3; row++) { for(col=0; col<3; col++) { scanf("%d", &A[row][col]); } } /* * Reads elements in second matrix from user */ printf("\nEnter elements in matrix B of size 3x3: \n"); for(row=0; row<3; row++) { for(col=0; col<3; col++) { scanf("%d", &B[row][col]); } } /* * Multiplies both matrices A*B */ for(row=0; row<3; row++) { for(col=0; col<3; col++) { sum = 0; /* * Multiplies row of first matrix to column of second matrix * And stores the sum of product of elements in sum. */ for(i=0; i<3; i++) { sum += A[row][i] * B[i][col]; } C[row][col] = sum; } } /* * Prints the product of matrices */ printf("\nProduct of Matrix A * B = \n"); for(row=0; row<3; row++) { for(col=0; col<3; col++) { printf("%d ", C[row][col]); } printf("\n"); } return 0; }

**Output : :**

**Output : :**

/* C Program for multiplication of two matrix using array */ Enter elements in matrix A of size 3x3: 1 2 3 4 5 6 7 8 9 Enter elements in matrix B of size 3x3: 9 8 7 6 5 4 3 2 1 Product of A * B = 30 24 18 84 69 54 138 114 90

Above is the source code for C Program for multiplication of two matrix using array which is successfully compiled and run on Windows System.The Output of the program is shown above .

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