Tutorials

C# String EndsWith() Method

Posted in C# Tutorial

Updated on Nov 17, 2024

By Mari Selvan

👁️ 133 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

🙋 Introduction

In C# programming, working with strings is a common and essential task.

The EndsWith() method is a member of the System.String class and is used to determine whether the end of the string instance matches a specified substring.

In this tutorial, we'll explore the usage and functionality of the EndsWith() method in C#.

💡 Syntax

The syntax for the EndsWith() method is as follows:

Syntax

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public bool EndsWith(string value);

value: The substring to compare.

The method returns a bool value, indicating whether the string ends with the specified substring.

📄 Example

Let's dive into examples to illustrate how the EndsWith() method works.

Program.cs

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using System;

class Program {
  static void Main() {
    string sampleString = "Hello, World";

    // Check if the string ends with "World"
    bool endsWithCSharp = sampleString.EndsWith("World");

    Console.WriteLine($"Example 1: {endsWithCSharp}");
    
    // case-insensitive check
    bool endsWithWorld = sampleString.EndsWith("world", StringComparison.OrdinalIgnoreCase);
    
    Console.WriteLine($"Example 2: {endsWithWorld}");
  }
}

💻 Testing the Program

Output

Example 1: True
Example 2: True

🧠 How the Program Works

In Example 1, the EndsWith() method is used to check if the string "Hello, World" ends with the specified substring World.

In Example 2, a case-insensitive check is performed to see if the string ends with the substring world.

↩️ Return Value

The EndsWith() method returns true if the string instance ends with the specified substring; otherwise, it returns false.

📚 Common Use Cases

The EndsWith() method is particularly useful when you need to perform conditional logic based on the ending characters of a string. It's commonly used in scenarios where you want to check file extensions, domain names, or specific patterns.

📝 Notes

The comparison is case-sensitive by default, but you can use overloads that allow you to specify whether the comparison should be case-insensitive.
If the specified substring is an empty string, the method returns true.

🎢 Optimization

The EndsWith() method is optimized for efficiency, and no specific optimizations are typically needed. If you're performing multiple checks with the same substring, consider storing the result in a variable to avoid redundant computations.

🎉 Conclusion

The EndsWith() method in C# provides a straightforward way to check whether a string ends with a specific substring. It's a valuable tool for string manipulation tasks and conditional logic.

Feel free to experiment with different strings and substrings to deepen your understanding of the EndsWith() method. Happy coding!