C# | Gets or sets the value of the bit at a specific position in the BitArray

Last Updated : 01 Feb, 2019

BitArray.Item[Int32] Property is used to get or set the value of the bit at a specific position in the BitArray.

Syntax:

public bool this[int index] { get; set; }

Here, the index is the zero-based Index of the value which is to get or set.

Return Value: It returns a boolean value of the bit at position index.

Exception: This property throws the ArgumentOutOfRangeException if the index is less than zero or index is equal to or greater than Count.

Below programs illustrate the use of above-discussed property:

Example 1:

   // C# program to illustrate the 
// BitArray.Item[Int32] Property 
using System; 
using System.Collections; 
  
class GFG { 
  
    // Driver code 
    public static void Main() 
    { 
  
        // Creating a BitArray myBitArr 
        BitArray myBitArr = new BitArray(5); 
  
        // Initializing all the bits in myBitArr 
        myBitArr[0] = false; 
        myBitArr[1] = true; 
        myBitArr[2] = true; 
        myBitArr[3] = false; 
        myBitArr[4] = true; 
  
        // Printing the values in myBitArr 
        Console.WriteLine("Initially the bits are as : "); 
  
        PrintIndexAndValues(myBitArr); 
  
        // after using item[int32] property 
        // changing the bit value of index 2 
        myBitArr[2] = false; 
  
        // Printing the values in myBitArr 
        Console.WriteLine("Finally the bits are as : "); 
  
        PrintIndexAndValues(myBitArr); 
    } 
  
    // Function to display bits 
    public static void PrintIndexAndValues(IEnumerable myArr) 
    { 
        foreach(Object obj in myArr) 
        { 
            Console.WriteLine(obj); 
        } 
    } 
} 
 
  

Output:

  Initially the bits are as :   False  True  True  False  True  Finally the bits are as :   False  True  False  False  True

Example 2:

   // C# program to illustrate the 
// BitArray.Item[Int32] Property 
using System; 
using System.Collections; 
  
class GFG { 
  
    // Driver code 
    public static void Main() 
    { 
  
        // Creating a BitArray myBitArr 
        BitArray myBitArr = new BitArray(5); 
  
        // Initializing all the bits in myBitArr 
        myBitArr[0] = true; 
        myBitArr[1] = false; 
        myBitArr[2] = false; 
        myBitArr[3] = false; 
        myBitArr[4] = true; 
  
        // after using item[int32] property 
        // it will give run time error as 
        // index is less than zero 
        myBitArr[-1] = false; 
  
        PrintIndexAndValues(myBitArr); 
    } 
  
    // Function to display bits 
    public static void PrintIndexAndValues(IEnumerable myArr) 
    { 
        foreach(Object obj in myArr) 
        { 
            Console.WriteLine(obj); 
        } 
    } 
} 
 
  

Runtime Error:

Unhandled Exception:
System.ArgumentOutOfRangeException: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

Note: Retrieving and setting the value of this property are an O(1) operation.

Reference:

https://docs.microsoft.com/en-us/dotnet/api/system.collections.bitarray.item?view=netframework-4.7.2

C# | Get value of the bit at a specific position in BitArray

Kirti_Mangal

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C# | Gets or sets the value of the bit at a specific position in the BitArray

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