C# | Set the bit at a specific position in the BitArray to the specified value
The BitArray class manages a compact array of bit values, which are represented as Booleans, where true indicates that the bit is on i.e, 1 and false indicates the bit is off i.e, 0. This class is contained in System.Collections namespace.
BitArray.Set(Int32, Boolean) method is used to set the bit at a specific position in the BitArray to the specified value.
Properties:
- The BitArray class is a collection class in which the capacity is always the same as the count.
- Elements are added to a BitArray by increasing the Length property.
- Elements are deleted by decreasing the Length property.
- Elements in this collection can be accessed using an integer index. Indexes in this collection are zero-based.
Syntax:
public void Set (int index, bool value);
Parameters:
index : The zero-based index of the bit to set.
value : The Boolean value to assign to the bit.
Exception: This method will give ArgumentOutOfRangeException if the index is less than zero or the index is greater than or equal to the number of elements in the BitArray.
Note: This method is an O(1) operation.
Below programs illustrate the use of BitArray.Set(Int32, Boolean) Method:
Example 1:
// C# code to set the bit at // a specific position in the // BitArray to the specified value using System; using System.Collections; class GFG { // Driver code public static void Main() { // Creating a BitArray myBitArr // Initializing all the values to false BitArray myBitArr = new BitArray(5, false ); // Printing the values in myBitArr // It should display all the bits as false Console.WriteLine( "Initially the bits are as : " ); PrintIndexAndValues(myBitArr); // Setting bit at index 3 to true myBitArr.Set(3, true ); // 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); } } } |
Initially the bits are as : False False False False False Finally the bits are as : False False False True False
Example 2:
// C# code to set the bit at // a specific position in the // BitArray to the specified value 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); // Setting bit at index 2 to false myBitArr.Set(2, false ); // Setting bit at index 3 to true myBitArr.Set(3, true ); // 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); } } } |
Initially the bits are as : False True True False True Finally the bits are as : False True False True True
Reference:
- https://docs.microsoft.com/en-us/dotnet/api/system.collections.bitarray.set?view=netframework-4.7.2