c#::::::question in printing text

Question

why an error is occurred when Console.WriteLine("x = {0}",x);and Console.WriteLine("y = {1}",y); statements are written in two different lines

Answer 1

use it:
Console.Write();

Answer 2

Console. WriteLine ("y={1}",y);

This is a new statement. It does know about the x-statement. Placeholders always should start with 0.
So it must be
Console.WriteLine ("y={0}",y);

Although placeholders do not have to follow a specific order.
Console.WriteLine ("{1}{0}",x,y);

https://code.sololearn.com/c9Sy3XspIEZB/?ref=app

Answer 3

The correct way is this

https://code.sololearn.com/c3VDHBww2kAg/?ref=app