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51 lines
1.0 KiB
Markdown
51 lines
1.0 KiB
Markdown
# <small>nlohmann::basic_json::</small>begin
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```cpp
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iterator begin() noexcept;
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const_iterator begin() const noexcept;
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```
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Returns an iterator to the first element.
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## Return value
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iterator to the first element
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## Exception safety
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No-throw guarantee: this member function never throws exceptions.
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## Complexity
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Constant.
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## Examples
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??? example
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The following code shows an example for `begin()`.
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```cpp
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--8<-- "examples/begin.cpp"
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```
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Output:
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```json
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--8<-- "examples/begin.output"
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```
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## See also
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- [end](end.md) returns an iterator to one past the last element
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- [cbegin](cbegin.md) returns a const iterator to the first element
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- [rbegin](rbegin.md) returns a reverse iterator to the last element
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- [items](items.md) returns an iteration proxy to access keys and values during range-based for loops
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- [Iterators](../../features/iterators.md) - the article on iterators
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## Version history
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- Added in version 1.0.0.
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