Methods

Declare a local function or static method

Top-level programs can use local functions. Classes use methods.

int Add(int a, int b) => a + b;
Console.WriteLine(Add(2, 3));

Return values and void

void methods perform work without returning data.

void Greet(string name)
{
    Console.WriteLine($"Hello, {name}");
}
Greet("World");

Optional parameters

Defaults make some arguments optional at the call site.

void Ping(string host = "localhost") => Console.WriteLine(host);
Ping();
Ping("example.com");

Method habits

• Use verbs for method names: CalculateTotal
• Keep methods focused on one job
• Prefer returning values over printing inside helpers
• Out and ref parameters exist; beginners can usually avoid them