Hello, C#

6 min 20 XP + 10 for no hints

A C# program starts in a method called Main. Console.WriteLine() prints text and then moves to a new line.

using System; lets you write Console instead of the full name System.Console. Curly braces group code into blocks.

Newer C# can skip the class and Main lines, but you'll meet this classic shape in most code you read.

Example (inside Main)

Console.WriteLine("Hi!");
Console.Write("2 + 3 = ");
Console.WriteLine(2 + 3);

Output

Hi!
2 + 3 = 5

Console.Write() prints without moving to a new line.

Your tasks

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What is the difference between Write and WriteLine?

Program.csChecked as you type

using System;

class Program
{
    static void Main()
    {
        Console.WriteLine("Hello, world!");
    }
}

No problems found. Unclosed tags, missing semicolons and errors show up here in plain words.

1using System;

3class Program

5 static void Main()

6 {

7 Console.WriteLine("Hello, world!");

8 }

The program starts in Main.

No variables yet

Step 1 of 3