Why is x and y given 0 and 1 respectively

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
int x = 10;
double y = 20;
Console.WriteLine("x = {0}; y = {1}", x, y);
}
}
}

Answer 1

The overload specification accepts the first argument as the format string ("x = {0}; y = {1}"). Whatever comes after the format string are treated as indexed arguments which are referred to by their index, because <x> comes after the format string it is referred to as the first indexed argument (index: 0), <y> that comes after <x> is referred to as the second indexed argument (index: 1).

If there were more arguments following the format string, each successive ones are referred to by their index, remember, indexing here uses zero based number.

Hth, cmiiw