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Logical Operators on String in C#
The following are the logical operators that you can use on Strings in C#.
| 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. |
Let us see an example showing how to use logical AND operator on strings −
Example
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
public class Demo {
public bool CheckUnique(string str) {
string one = "";
string two = "";
for (int i = 0; i < str.Length; i++) {
one = str.Substring(i, 1);
for (int j = 0; j < str.Length; j++) {
two = str.Substring(j, 1);
if ((one == two) && (i != j))
return false;
}
}
return true;
}
static void Main(string[] args) {
Demo d = new Demo();
bool b = d.CheckUnique("amit");
Console.WriteLine(b);
Console.ReadKey();
}
}
Output
True
Updated on: 2020-06-21T12:40:48+05:30
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