Erase Methods

The erase() methods remove characters from a string. Here are their prototypes:

basic_string& erase(size_type pos = 0, size_type n = npos);
iterator erase(const_iterator position);
iterator erase(const_iterator first, iterator last);
void pop_back();

The first form removes the character from position pos to n characters later or the end of the string, whichever comes first. The second removes the single character referenced by the iterator position and returns an iterator to the next element or if there are no more elements, returns end(). The third removes the characters in the range [first, last); that is, including first and up to but not including last. The method returns an iterator to the element following the last element erased. Finally, the pop_back() method removes the last character in the string.