# Operator overloading

Inko supports a variety of operators (see this section for the full list), and these can be implemented for your own types. In fact, operators are just regular methods, though the compiler may choose to optimise some of them whenever possible.

Operators are provided by the various traits found in the module `std::ops`

. For
example, the `+`

operator is provided by the `Add`

trait. Here's how we might
implement this operator for a custom type:

```
import std::ops::Add
class Rational {
let @numerator: Int
let @denominator: Int
}
impl Add[Rational] for Rational {
fn pub +(other: ref Rational) -> Rational {
Rational {
@numerator = @numerator + other.numerator,
@denominator = @denominator + other.denominator
}
}
}
```