Question Writing BitArray to Console

[Keith_K]

Hello, friends.

I wanted to learn about bit arrays and so, I sought an example,
(PS - you can stop reading the example code after line 22):

using System;
using System.Collections;

namespace CollectionsApplication {
   class Program {
      static void Main(string[] args) {
         //creating two  bit arrays of size 8
         BitArray ba1 = new BitArray(8);
         BitArray ba2 = new BitArray(8);
       
         byte[] a = { 60 };
         byte[] b = { 13 };
       
         //storing the values 60, and 13 into the bit arrays
         ba1 = new BitArray(a);
         ba2 = new BitArray(b);
       
         //content of ba1
         Console.WriteLine("Bit array ba1: 60");
       
         for (int i = 0; i < ba1.Count; i++) {
            Console.Write("{0, -6} ", ba1[i]);
         }
         Console.WriteLine();
       
         //content of ba2
         Console.WriteLine("Bit array ba2: 13");
       
         for (int i = 0; i < ba2.Count; i++) {
            Console.Write("{0, -6} ", ba2[i]);
         }
         Console.WriteLine();
         BitArray ba3 = new BitArray(8);
         ba3 = ba1.And(ba2);
       
         //content of ba3
         Console.WriteLine("Bit array ba3 after AND operation: 12");
       
         for (int i = 0; i < ba3.Count; i++) {
            Console.Write("{0, -6} ", ba3[i]);
         }
         Console.WriteLine();
         ba3 = ba1.Or(ba2);
       
         //content of ba3
         Console.WriteLine("Bit array ba3 after OR operation: 61");
       
         for (int i = 0; i < ba3.Count; i++) {
            Console.Write("{0, -6} ", ba3[i]);
         }
         Console.WriteLine();

         Console.ReadKey();
      }
   }
}

I want to understand the use of the numbers 0 and -6 that are being written to the console. They don't seem like indices. What are they about? Why those specific numbers? Thanks.

 

[jmcilhinney]

This explains everything you need to know on the subject:

Composite formatting - .NET

Learn about .NET composite formatting, which takes as input a list of objects and a composite format string, containing fixed text with indexed placeholders.

docs.microsoft.com

 

[JohnH]

Spesifically from Format Item Syntax:

{ index[,alignment][:formatString]}

 

[Keith_K]

This explains everything you need to know on the subject:

Composite formatting - .NET

Learn about .NET composite formatting, which takes as input a list of objects and a composite format string, containing fixed text with indexed placeholders.

docs.microsoft.com

Thank you!