C# Program to Check Given Strings are Equal or Not Using equal to (==) Operator

Given two strings we need to check if they are equal by using the == operator. The == Operator compares the reference identity i.e. whether they are referring to the same identity in the heap. If they are equal then it will return true, otherwise, return false.

Example:

Input
String 1 : geeks
String 2 : geeks
Output   : Equal

Input
String 1 : geeks
String 2 : geeqs
Output   : Not Equal

Method:

For the given two strings compare them by using == operator

• If it returns true then the strings are equal.
• If it returns false then the strings are not equal.

Example 1:

C#

// C# program to check given strings are
// equal or not. Using == operator
using System;

class GFG{

public static void Main()
{
    string str1 = "geeks";
    string str2 = "geeks";

    // Here we use == operator to check
    // the equality of the strings
    Console.WriteLine(str1 == str2);
}
}

Output

True

Example 2:

C#

// C# program to check given strings
// are equal or not. Using == operator
using System;

class GFG{

public static void Main()
{
    string str1 = "geeks";
    string str2 = "geeqs";

    // Here we use == operator to check
    // the equality of the strings
    Console.WriteLine(str1 == str2);
}
}

Output

False

But the == operator might not work as expected when we are comparing strings whose reference identities are not the same. Let us understand with the help of the below example:

C#

// C# program to check given strings
// are equal or not. Using == operator
using System;

class GFG{

static void Main(string[] args)
{
    object str1 = "geeks";
    object str2 = new string("geeks");

    Console.WriteLine(str1 == str2);
}
}

Output

False