What does that mean?

Question

Hello,
This is the code I have a problem with

Random rnd = new Random();

Console.WriteLine("Generating 10 random numbers:");

for (uint ctr = 1; ctr <= 10; ctr++)
Console.WriteLine(

Answer 1

15:N0 means 15 character wide column, right align, formatted as number, 0 decimal places.

Search about Composite Formatting

Answer 2

Thanks