How insert element in last list?

Question

I have a list m. I want to insert an element to the end of this List. Please tell me how I can do this.

public List<double> m = new List<double>();
m[0].Add(1);
m[1].Add(2);
m[2].Add(3);

I want the following output if I add element 7 to the end:

1 2 3 7 

Answer 1

m.Add(7); will add it to the end of the list.

What you are doing is trying to call the method Add on a double

Answer 2

Use:

List<double> m = new List<double>();
m.Add(1);
m.Add(2);
m.Add(3);
m.Add(7);