using System.Console; // classes and modules (static classes) can be put in namespaces
def next(x) { x + 1 }; // the type of x argument and other function arguments can be deduced from usage

def mult(x, y) { x * y };

def fibbonacci(i)
{
| 0 => 0
| 1 => 1
| other => fibbonacci(i - 1) + fibbonacci(i - 2)
};

WriteLine(next(9)); // 10 similar to "Console.WriteLine(next(9));"
WriteLine(mult(2, 2)); // 4
WriteLine(fibbonacci(10)); // 55

Variants (called data types or sum types in SML and OCaml) are forms of expressing data of several different kinds:

variant RgbColor{
| Red
| Yellow
| Green
| Different {
red : float;
green : float;
blue : float;
}
}

Nemerle allows to create, analyze and modify code of a program during a compilation process using a powerful macro system.