Mastering Logical Operators in C# Programming: A Complete Guide
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Table of Content:
Following table shows all the logical operators supported by C#. Assume variable A holds Boolean value true and variable B holds Boolean value false, then −
| Operator | Description | Example |
|---|---|---|
| && | Called Logical AND operator. If both the operands are non zero then condition becomes true. | (A && B) is false. |
| || | Called Logical OR Operator. If any of the two operands is non zero then condition becomes true. | (A || B) is 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. | !(A && B) is true. |
Example
The following example demonstrates all the logical operators available in C# −
using System;
namespace OperatorsAppl {
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");
}
/* lets change the value of a and b */
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();
}
}
}
When the above code is compiled and executed, it produces the following result −
Line 1 - Condition is true Line 2 - Condition is true Line 3 - Condition is not true Line 4 - Condition is true