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json/api/basic_json/crbegin/index.md
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2026-07-08 18:19:46 +00:00

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# nlohmann::basic_json::crbegin
```
const_reverse_iterator crbegin() const noexcept;
```
Returns an iterator to the reverse-beginning; that is, the last element.
## 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 `crbegin()`.
```
#include <iostream>
#include <nlohmann/json.hpp>
using json = nlohmann::json;
int main()
{
// create an array value
json array = {1, 2, 3, 4, 5};
// get an iterator to the reverse-beginning
json::const_reverse_iterator it = array.crbegin();
// serialize the element that the iterator points to
std::cout << *it << '\n';
}
```
Output:
```
5
```
## Version history
- Added in version 1.0.0.