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# core::ops::arith::AddAssign

The addition assignment operator `+=`.

## Signature

```rust theme={null}
pub trait AddAssign
```

## Trait functions

### add\_assign

Performs the `+=` operation.

#### Signature

```rust theme={null}
fn add_assign(ref self: Lhs, rhs: Rhs)
```

#### Examples

```rust theme={null}
let mut x: u8 = 3;
x += x;
assert!(x == 6);
```