c# - How can I get the sum of numbers from a diagonal line? -

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here sum diagonal top-left bottom-right:

public int sumardiagonal() {     int x = 0;     (int f = 0; f < filas; f++)     {         (int c = 0; c < columnas; c++)         {             if (f == c)             {                 x += m[f,c];             }         }     }     return x; }

how can go top-right bottom-left?

your original code 2 nested loops not efficient. better this:

public int sumardiagonal()  {   int x = 0;   (int = 0; < math.min(filas,columnas); ++i)    x += m[i,i];   return x;  }   public int sumarantidiagonal()  {   int x = 0;   (int = 0; < math.min(filas,columnas); ++i)    x += m[filas - 1 - i,i];   return x;  }

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