In this example I’ll show you how to calculating determinant 2×2 **of a matrix calculator.**

C# Code:

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class Program { public static double det(double[,] A, int N) { double c, r = 1; for (int i = 0; i < N; i++) { for (int k = i + 1; k < N; k++) { c = A[k,i] / A[i,i]; for (int j = i; j < N; j++) A[k,j] = A[k,j] - c * A[i,j]; } } for (int i = 0; i < N; i++) r *= A[i,i]; return r; } static void Main(string[] args) { int d = 2; double[,] M = new double[d, d]; M[0,0] = 8; M[0,1] = 15; M[1,0] = 3; M[1,1] = 7; //Print Matrix for (int i = 0; i < d; i++) { for (int j = 0; j < d; j++) { Console.Write(M[i, j]+" "); } Console.WriteLine(); } Console.WriteLine("Det(M) = {0}", det(M, d)); Console.ReadLine(); } } |

Output: