Home » C#.Net

String.Inequality (!=) operator with example in C#

C# String.Inequality operator: Here, we are going to learn about the String.Inequality (!=) operator, its usages etc.
Submitted by IncludeHelp, on March 18, 2019

C# String.Inequality operator

"!=" is a String.Inequality operator in C#, it 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: It has two parameters both are strings to compare..

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