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json/api/basic_json/rbegin.md
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2026-10-03 05:43:12 +00:00

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# <small>nlohmann::basic_json::</small>rbegin
```cpp
reverse_iterator rbegin() noexcept;
const_reverse_iterator rbegin() const noexcept;
```
Returns an iterator to the reverse-beginning; that is, the last element.
![Illustration from cppreference.com](../../images/range-rbegin-rend.svg)
## Return value
reverse iterator to the last element
## Exception safety
No-throw guarantee: this member function never throws exceptions.
## Complexity
Constant.
## Examples
??? example
The following code shows an example for `rbegin()`.
```cpp
--8<-- "examples/rbegin.cpp"
```
Output:
```json
--8<-- "examples/rbegin.output"
```
## See also
- [rend](rend.md) returns a reverse iterator to one before the first element
- [crbegin](crbegin.md) returns a const reverse iterator to the last element
- [begin](begin.md) returns an iterator to the first element
- [Iterators](../../features/iterators.md) - the article on iterators
## Version history
- Added in version 1.0.0.