C# ReadLine and WriteLine

Question

{
string yourName;
Console.WriteLine("What is your name?");

yourName = Console.ReadLine();

Console.WriteLine("Hello {0}", yourName);
}
why is there a {0} after "Hello" in line 6??

Answer 1

{0} is a placeholder for the variable.

In this case it is is the variable yourName

Console.WriteLine("Hello {0}", yourName);
This wil print "Hello Alexander"

Console.WriteLine("{0} Hello", yourName);
This wil print "Alexander Hello"

https://code.sololearn.com/c9Sy3XspIEZB/#cs