Example: 2x2 Matrix Multiplication in C

// 2x2 Matrix Multiplication
#include <stdio.h>

int main() {
    int A[2][2] = {{1, 2}, {3, 4}}; // First 2x2 matrix
    int B[2][2] = {{5, 6}, {7, 8}}; // Second 2x2 matrix
    int C[2][2];                   // Resultant 2x2 matrix
    int i, j, k;

    // Step 1: Initialize the resultant matrix C with zeros
    for (i = 0; i < 2; i++) {
        for (j = 0; j < 2; j++) {
            C[i][j] = 0;
        }
    }

    // Step 2: Perform matrix multiplication
    // Outer loops iterate through rows of A (i) and columns of B (j)
    for (i = 0; i < 2; i++) {       // Iterate through rows of resultant matrix C
        for (j = 0; j < 2; j++) {   // Iterate through columns of resultant matrix C
            for (k = 0; k < 2; k++) { // Iterate through columns of A / rows of B
                C[i][j] += A[i][k] * B[k][j];
            }
        }
    }

    // Step 3: Print the resultant matrix C
    printf("Resultant Matrix C:\n");
    for (i = 0; i < 2; i++) {
        for (j = 0; j < 2; j++) {
            printf("%d ", C[i][j]);
        }
        printf("\n"); // New line after each row
    }

    return 0;
}