Logical operators are used with Boolean values. The following three logical operators are available in C#.
| Operator | Description |
|---|---|
| && | Called Logical AND operator. If both the operands are non zero then condition becomes true. |
| || | Called Logical OR Operator. If any of the two operands is non zero then condition becomes true. |
| ! | Called Logical NOT Operator. Use to reverses the logical state of its operand. If a condition is true then Logical NOT operator will make false. |
Let us see an example that shows how to work with logical operators in C#. Here condition is checked for Logical AND operator.
if (a && b) {
Console.WriteLine("Line 1 - Condition is true");
}In the same way, let us see how to work with other logical operators in C#.
Example
using System;
namespace Demo {
class Program {
static void Main(string[] args) {
bool a = true;
bool b = true;
if (a && b) {
Console.WriteLine("Line 1 - Condition is true");
}
if (a || b) {
Console.WriteLine("Line 2 - Condition is true");
}
a = false;
b = true;
if (a && b) {
Console.WriteLine("Line 3 - Condition is true");
} else {
Console.WriteLine("Line 3 - Condition is not true");
}
if (!(a && b)) {
Console.WriteLine("Line 4 - Condition is true");
}
Console.ReadLine();
}
}
}Output
Line 1 - Condition is true Line 2 - Condition is true Line 3 - Condition is not true Line 4 - Condition is true