# WAP in C to read two 3*3 matrix and multiply there values and store them in third matrix!

The Program in C to read two 3*3 matrix and multiply there values and store them in third matrix is given below:

``````#include <stdio.h>

int main() {
int a, b, c, i, j, k, sum = 0;

printf("Enter elements of first 3x3 matrix: \n");
for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++) {
scanf("%d", &a[i][j]);
}
}

printf("Enter elements of second 3x3 matrix: \n");
for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++) {
scanf("%d", &b[i][j]);
}
}

for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++) {
for (k = 0; k < 3; k++) {
sum = sum + a[i][k]*b[k][j];
}
c[i][j] = sum;
sum = 0;
}
}

printf("Product of the matrices: \n");
for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++) {
printf("%d ", c[i][j]);
}
printf("\n");
}

return 0;
}
``````

## Output:

Enter elements of first 3×3 matrix:
1
9
5
7
8
4
5
6
7
Enter elements of second 3×3 matrix:
8
9
7
5
3
7
8
9
5
Product of the matrices:
93 81 95
128 123 125
126 126 112

## Pro-Tips💡

This program uses two nested for loops to read the elements of the first 3×3 matrix from the user, and another two nested loops to read the elements of the second 3×3 matrix.

Then, the program uses three nested for loops to multiply the corresponding elements of the first and second matrices and store the result in the third matrix.

The outer two loops iterate over the rows and columns of resultant matrix and inner loop iterates over the columns of first matrix and rows of second matrix and sums the product of corresponding elements of first and second matrix.

Finally, the program uses two nested for loops again to print the elements of the third matrix which is the product of the first and second matrix.

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