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Showing content from https://www.tutorialspoint.com/cpp_standard_library/cpp_string_back.htm below:

C++ String back() Function

It returns a reference to the last character of the string.

Following is the declaration for std::string::back.

char& back();

const char& back() const;

none

It returns a reference to the last character of the string.

if an exception is thrown, there are no changes in the string.

In below example for std::string::back.

#include <iostream>
#include <string>

int main () {
   std::string str ("sairamkrishna mammahe.");
   str.back() = '!';
   std::cout << str << '\n';
   return 0;
}

sairamkrishna mammahe!

string.htm

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