# Numbers: `u8`, `i8`, `u16`, `i16`, `u32`, `i32`, `u64`, `i64`, `isize`, `usize`, `f32`, and `f64`

| `T` parameter | `&T` parameter | `&mut T` parameter | `T` return value | `Option<T>` parameter | `Option<T>` return value | JavaScript representation |
|:---:|:---:|:---:|:---:|:---:|:---:|:---:|
| Yes | No | No | Yes | Yes | Yes | A JavaScript number value |

## Example Rust Usage

```rust
{{#include ../../../../examples/guide-supported-types-examples/src/numbers.rs}}
```

## Example JavaScript Usage

```js
{{#include ../../../../examples/guide-supported-types-examples/numbers.js}}
```
