C# String Equals()

using System;  
namespace CsharpString {  
  class Test {
    public static void Main(string [] args) {
     
      string str1 = "Ice cream";
      string str2 = "Ice cream";

      // comparing str1 with str2
      bool result = String.Equals(str1, str2);

      Console.WriteLine(result);
     
      Console.ReadLine();    
    }
  } 
}

// Output: True

Equals() Syntax

The syntax of the string Equals() method is:

String.Equals(string a, string b)

Here, Equals() is a method of class String.

Equals() Parameters

The Equals() method takes the following parameters:

• a - first string to compare
• b - second string to compare

Equals() Return Value

The Equals() method returns:

• True - if the strings are equal
• False - if the strings are not equal

Example 1: C# String Equals()

using System;  
namespace CsharpString {  
  class Test {
    public static void Main(string [] args) {
     
      string str1 = "Ice cream";
      string str2 = "Ice cream";
      string str3 = "Chocolate";

      bool result;

      // comparing str1 with str2
      result = String.Equals(str1, str2);
      Console.WriteLine("str1 and str2 are equal: " + result);

      // comparing str1 with str3
      result = String.Equals(str1, str3);
      Console.WriteLine("str1 and str3 are equal: " + result);
 
      Console.ReadLine();    
    }
  } 
}

Output

str1 and str2 are equal: True
str1 and str3 are equal: False

Here,

• String.Equals(str1, str2) - returns True as str1 and str2 are equal
• String.Equals(str1, str3) - returns False as str1 and str3 are not equal

Example 2: Check if Two Strings Are Equal

using System;  
namespace CsharpString {  
  class Test {
    public static void Main(string [] args) {
     
      string str1 = "Ice cream";
      string str2 = "Ice cream";
      
      // compares str1 and str2
      if(String.Equals(str1, str2))
 {
        Console.WriteLine("str1 and str2 are equal");
      }

      else {
        Console.WriteLine("str1 and str2 are not equal");
      }
 
      Console.ReadLine();    
    }
  } 
}

Output

str1 and str2 are equal

Example 3: Equals() With Case

using System;  
namespace CsharpString {  
  class Test {
    public static void Main(string [] args) {
     
      string str1 = "Ice cream";
      string str2 = "ice cream";
      
      // compares str1 and str2
      bool result = String.Equals(str1, str2);
      Console.WriteLine("str1 and str2 are equal: " + result);   
 
      Console.ReadLine();    
    }
  } 
}

Output

str1 and str2 are equal: False

When "Ice cream" is compared to "ice cream", we get False. This is because Equals() considers the letter case.

String.Equals(str1, str2, StringComparison.OrdinalIgnoreCase)