iterator begin() noexcept;
const_iterator begin() const noexcept;

Returns an iterator to the first element.

iterator to the first element

No-throw guarantee: this member function never throws exceptions.

Constant.

??? example

The following code shows an example for `begin()`.

```cpp
--8<-- "examples/begin.cpp"
```

Output:

```json
--8<-- "examples/begin.output"
```

• Added in version 1.0.0.