# Trait typenum::type_operators::Logarithm2

source · ```
pub trait Logarithm2 {
type Output;
}
```

## Expand description

A **type operator** for taking the integer binary logarithm of `Self`

.

The integer binary logarighm of `n`

is the largest integer `m`

such
that `n >= 2^m`

. This definition is equivalent to truncating the
real-valued binary logarithm: `floor(log2(n))`

.