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# std::vector::clear

From cppreference.com
< cpp‎ | container‎ | vector

[edit template]

void clear(); |  |

Removes all elements from the container.

Invalidates any references, pointers, or iterators referring to contained elements. Any past-the-end iterators are also invalidated.

Leaves the capacity() of the vector unchanged (note: the standard's restriction on the changes to capacity is in the specification of `vector::reserve`, see [1])

### [edit] Parameters

(none)

### [edit] Return value

(none)

### [edit] Exceptions

(none) | (until C++11)
`noexcept` specification: noexcept | (since C++11)

### [edit] Complexity

Linear in the size of the container.

### Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR | Applied to | Behavior as published | Correct behavior
--- | --- | --- | ---
LWG 2231 | C++11 | complexity guarantee was mistakenly omitted in C++11 | complexity reaffirmed as linear

### [edit] See also

erase | erases elements (public member function) [edit]

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