Use of unassigned out parameter, c#

Question

I have very simple problem. I made a very simple function for you to demonstrate my problem.

static void Main(string[] args)       
{
    double[,] mydouble          


        

Answer 1

The error message is clear - you need to assign a value to your out parameter inside your method:

public static void mynewMatrix(out double[,] d)
{
    d = new double[1, 4];
    for (int i = 0; i < 4; i++)
    {
        d[0,i]=i;
    }
}

The assignment you made outside the method has no effect. Just write this:

static void Main(string[] args)       
{
    double[,] mydouble;
    mynewMatrix(out mydouble);
}