c# Displaying Output

Question

if i place "x={0} ;y={1}" but why it is throwing error if i replace other values other than 0 and 1
https://code.sololearn.com/cRDZBTbQ9xeH/#cs

Answer 1

The numbers inside curly braces e.g. {0} corrispond to the position of the argument(s) passed (not including the string itself) starting from zero e.g.
Console.WriteLine("{0}:{1}", 12, 65);
In this case 12 is the 0th arg and 65 is the 1st.