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

Last Updated : 11 Nov, 2021
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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

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