Question

How to calculate the determinant of a 3X3 matrix in Dart

Answer 1

/* 
 *       a b c
 * arr = d e f
 *       g h i
 * 
 * determinant = a*(e*i - f*h) - b*(d*i-f*g) + c*(d*h - e*g)
 * 
 */

void main() {
    List<List<int>> matrix = [[6, 1, 1], [4, -2, 5], [2, 8, 7]];
    
    var determinant = 
            matrix[0][0] * (matrix[1][1] * matrix[2][2] - matrix[1][2] * matrix[2][1]) - 
            matrix[0][1] * (matrix[1][0] * matrix[2][2] - matrix[1][2] * matrix[2][0]) + 
            matrix[0][2] * (matrix[1][0] * matrix[2][1] - matrix[1][1] * matrix[2][0]);
    
    print(determinant);
}




/*
run:
    
-306 
      
*/

 

70+ SQL courses for beginners and professionals