Csharp/CSharp Tutorial/Data Type/Bitwise AND

bitwise AND

class MainClass
{
  public static void Main()
  {
    byte byte1 = 0x9a;  // binary 10011010, decimal 154
    byte byte2 = 0xdb;  // binary 11011011, decimal 219
    byte result;
    System.Console.WriteLine("byte1 = " + byte1);
    System.Console.WriteLine("byte2 = " + byte2);
    
    result = (byte) (byte1 & byte2);
    System.Console.WriteLine("byte1 & byte2 = " + result);
  }
}

byte1 = 154
byte2 = 219
byte1 & byte2 = 154

Use bitwise AND to determine if a number is odd.

using System; 
 
class Example {  
  public static void Main() { 
    ushort num;  
 
    num = 10; 
 
    if((num & 1) == 1) 
      Console.WriteLine("This won"t display."); 
 
    num = 11; 
 
    if((num & 1) == 1) 
      Console.WriteLine(num + " is odd."); 
 
  } 
}

11 is odd.

Use bitwise AND to make a number even

using System; 
 
class Example {  
  public static void Main() { 
    ushort num;  
    ushort i;     
 
    for(i = 1; i <= 10; i++) { 
      num = i; 
 
      Console.WriteLine("num: " + num); 
 
      num = (ushort) (num & 0xFFFE); // num & 1111 1110 
 
      Console.WriteLine("num after turning off bit zero: " 
                        +  num + "\n");  
    } 
  } 
}

num: 1
num after turning off bit zero: 0
num: 2
num after turning off bit zero: 2
num: 3
num after turning off bit zero: 2
num: 4
num after turning off bit zero: 4
num: 5
num after turning off bit zero: 4
num: 6
num after turning off bit zero: 6
num: 7
num after turning off bit zero: 6
num: 8
num after turning off bit zero: 8
num: 9
num after turning off bit zero: 8
num: 10
num after turning off bit zero: 10