Interpolation

Question

static void Main(string[] args)
{
int x = 10;
double y = 20;

Console.WriteLine("x = {0}; y = {1}", x, y);
}
// Output: x = 10; y = 20
so why it is written {0};{1}",x,y)';

Answer 1

Under the curlybraces {0} or {1} simbolize the order of the value which have to be presented.
In your case x in the first order so y will be printed after the x.
For more if you do something like this.
int n=1;
int x=2;
int y=3;
int z=4;

Console.WriteLine("{3} {2} {1} {0}",n,x,y,z);
// This will print backwards 4 3 2 1
Where n comes in fourth,x comes in third and that's all.
Hope you get it.