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& Operator

The & operator can function as either a unary or a binary operator.

& expr
expr1 & expr2

Where:

expr
An expression.
expr1
An expression.
expr2
An expression.

Remarks

The unary & operator returns the address of its operand (requires unsafe context).

Binary & operators are predefined for the integral types and bool. For integral types, & computes the bitwise AND of its operands. For bool operands, & computes the logical AND of its operands; that is, the result is true if and only if both its operands are true.

User-defined types can overload the binary & operator (see operator).

Example

// cs_operator_ampersand.cs
using System;
class Test 
{
   public static void Main() 
   {
      Console.WriteLine(true & false); // logical and
      Console.WriteLine(true & true);  // logical and
      Console.WriteLine("0x{0:x}", 0xf8 & 0x3f);  // bitwise and
   }
}

Output

False
True
0x38

See Also

C# Operators | 7.10 Logical operators | A.2 Pointer types

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