Strings and Interpolation in C# - Example You Can Run Online

Introduction

Strings are immutable reference types with rich formatting and search operations.

Interpolation inserts expressions inside braces. Trim returns a new string and does not mutate the original value.

Runnable C# example

C#

Program.cs

using System;

class Program
{
    static void Main()
    {
        string name = "  Ada Lovelace  ";
        string clean = name.Trim();
        Console.WriteLine($"{clean} has {clean.Length} characters.");
        Console.WriteLine(clean.Contains("Love", StringComparison.OrdinalIgnoreCase));
    }
}

Result of running the code

Ada Lovelace has 12 characters.
True

Practice with the debugger

Set a breakpoint on an important assignment or condition, click Debug, and inspect the local values before stepping to the next line.

Practice with a challenge

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