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

  • Last Updated : 11 Nov, 2021

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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