# Trait core::num::One [−] [src]

    pub trait One: Sized {
        fn one() -> Self;
    }

Unstable (`zero_one` #27739)

: unsure of placement, wants to use associated constants

Types that have a "one" value.

This trait is intended for use in conjunction with `Mul`, as an identity: `x * T::one() == x`.

## Required Methods

### `fn one() -> Self`

Unstable (`zero_one` #27739)

: unsure of placement, wants to use associated constants

The "one" (usually, multiplicative identity) for this type.

## Implementors

- `impl One for u8`
- `impl One for u16`
- `impl One for u32`
- `impl One for u64`
- `impl One for usize`
- `impl One for i8`
- `impl One for i16`
- `impl One for i32`
- `impl One for i64`
- `impl One for isize`
- `impl One for f32`
- `impl One for f64`

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