reference back(); | (since {std}) | |
const_reference back() const; | (since {std}) |
Returns reference to the last element in the container.
Calling back on an empty container is undefined.
Parameters
(none).
Return value
Reference to the last element.
Complexity
Constant.
Notes
For a container c, the expression return c.back(); is equivalent to { auto tmp = c.end(); --tmp; return *tmp; }
Example
The following code uses back to display the last element of a std::dynarray<char>:
#include <dynarray>
#include <iostream>
int main()
{
std::dynarray<char> letters {'o', 'm', 'g', 'w', 't', 'f'};
if (!letters.empty()) {
std::cout << "The last character is: " << letters.back() << '\n';
}
}Output:
The last character is f
See also
| access the first element (public member function) |
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