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C++ vector Library


C++ vector Library

The <vector> library has many functions that allow you to perform tasks on vectors.

A list of popular vector functions can be found in the table below.

Function Description
assign() Fills a vector with multiple values
at() Returns an indexed element from a vector
back() Returns the last element of a vector
begin() Returns an iterator pointing to the beginning of a vector
capacity() Returns the number of elements that a vector's reserved memory is able to store
clear() Removes all of the contents of a vector
data() Returns a pointer to the block of memory where a vector's elements are stored
empty() Checks whether a vector is empty or not
end() Returns an iterator pointing to the end of a vector
erase() Removes a number of elements from a vector
front() Returns the first element of a vector
insert() Inserts a number of elements into a vector
max_size() Returns the maximum number of elements that a vector can have
pop_back() Removes the last element of a vector
push_back() Adds an element to the end of a vector
rbegin() Returns a reverse iterator pointing to the last element of a vector
rend() Returns a reverse iterator pointing to a position right before the first element of a vector
reserve() Reserves memory for a vector
resize() Changes the size of a vector, adding or removing elements if necessary
shrink_to_fit() Reduces the reseved memory of a vector if necessary to exactly fit the number of elements
size() Returns the number of elements in a vector
swap() Swaps the contents of one vector with another

Learn more about vectors in our C++ Vector Tutorial.



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