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C# String.Inequality (!=) Operator with Example

In this tutorial, we will learn about the String.Inequality (!=) operator with its usage, syntax, and examples. By IncludeHelp Last updated : April 07, 2023

C# String.Inequality (!=) Operator

The String.Inequality (!=) operator is used to check whether two strings objects have the same values or not (returns true if strings do not have the same values).

Syntax

public static bool operator != (string a, string b);

Parameter(s)

• string a: The first string to be compared.
• string b: The second string to be compared.

Return Value

bool – it returns a Boolean value. If strings have the same value, it returns false, else it returns true.

Example

Input:
string str1 = "IncludeHelp";
string str2 = "IncludeHelp";

String.Inequality:
str1 != str2;

Output:
false

C# example to compare two strings using String.Inequality (!=) operator

using System;
using System.Text;

namespace Test {
  class Program {
    static void Main(string[] args) {
      string str1 = "IncludeHelp";
      string str2 = "IncludeHelp";

      //comparing strings
      Console.WriteLine("str1!=str2: " + (str1 != str2));
      if (str1 != str2)
        Console.WriteLine("str1 and str2 don't have the same values");
      else
        Console.WriteLine("str1 and str2 have the same values");

      str1 = "Hello world";
      str2 = "IncludeHelp";

      //comparing strings
      Console.WriteLine("str1!=str2: " + (str1 != str2));
      if (str1 != str2)
        Console.WriteLine("str1 and str2 don't have the same values");
      else
        Console.WriteLine("str1 and str2 have the same values");

      //hit ENTER to exit
      Console.ReadLine();
    }
  }
}

Output

str1!=str2: False
str1 and str2 have the same values
str1!=str2: True
str1 and str2 don't have the same values

Reference: String.Inequality(String, String) Operator