# std::basic_const_iterator<Iter>::operator++,--,+=,-=

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< cpp‎ | iterator‎ | basic const iterator

constexpr basic_const_iterator& operator++(); | (1) | (since C++23)
constexpr void operator++(int); | (2) | (since C++23)
constexpr basic_const_iterator operator++(int) requires std::forward_iterator <Iter>; | (3) | (since C++23)
constexpr basic_const_iterator& operator--() requires std::bidirectional_iterator <Iter>; | (4) | (since C++23)
constexpr basic_const_iterator operator--(int) requires std::bidirectional_iterator <Iter>; | (5) | (since C++23)
constexpr basic_const_iterator& operator+=( difference_type n ) requires std::random_access_iterator <Iter>; | (6) | (since C++23)
constexpr basic_const_iterator& operator-=( difference_type n ) requires std::random_access_iterator <Iter>; | (7) | (since C++23)

Increments or decrements the iterator, by applying the corresponding operation on the underlying iterator.

1-3) Increments by one.
4,5) Decrements by one.
6,7) Advances the iterator by n or -n positions respectively.

### Return value

1,4,6,7) *this
3,5) A copy of *this that was made before the change
2) (none)

### Example

| This section is incomplete Reason: no example

### See also

operator++operator++(int)operator+=operator+operator--operator--(int)operator-=operator- (C++11) | advances or decrements the iterator (public member function of `std::move_iterator<Iter>`)

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