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json/docs/mkdocs/docs/api/basic_json/cbegin.md
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# <small>nlohmann::basic_json::</small>cbegin
```cpp
const_iterator cbegin() const noexcept;
```
Returns an iterator to the first element.
![Illustration from cppreference.com](../../images/range-begin-end.svg)
## Return value
iterator to the first element
## Exception safety
No-throw guarantee: this member function never throws exceptions.
## Complexity
Constant.
## Examples
??? example
The following code shows an example for `cbegin()`.
```cpp
--8<-- "examples/cbegin.cpp"
```
Output:
```json
--8<-- "examples/cbegin.output"
```
## Version history
- Added in version 1.0.0.