Mastering C# Fundamentals: Recap on Strings

Meta Description: Learn the essentials of working with strings in C#: defining strings, using implicit typing, creating empty strings, and basic string methods like ToLower and ToUpper. This quick recap will help you solidify your understanding of string basics

Introduction:
Provide a brief introduction to what strings are in C# and their importance.

String Basics Recap:

1. Defining Strings:

   • Introduce the string keyword: string firstName = "John";.
   • Mention that a string value should be surrounded by double quotes.
   • Explain how you can declare a string variable without assigning a value immediately, like:

    string lastName;
    lastName = "Doe";
   

2. Using Implicit Typing:

   • Explain that you can use var to declare a string, and C# will infer its type:

    var fullName = "John Doe";  // This is also a string.
   

3. Empty Strings:

   • Describe how to create an empty string using a pair of double quotes ("") or using string.Empty:

    string emptyString = "";  // Equivalent to: string emptyString = string.Empty;
   

4. String Methods:

   • Mention that strings have useful built-in methods, such as:
     • ToLower(): Converts all characters to lowercase.

      string lowerName = firstName.ToLower();  // Output: "john"
   

 - `ToUpper()`: Converts all characters to uppercase.

   ```csharp
   string upperName = lastName.ToUpper();  // Output: "DOE"
   ```

Conclusion:
Summarize what strings are, the different ways to define them, and some basic operations that can be performed on strings. Encourage readers to practice defining and working with strings to get comfortable with these foundational concepts.