Question

explain any four method of string class ​

Answer 1

Answer

Hello, because the choice of language is not mentioned in respective

question so the answer is according to C++'s native string class..

4 methods are as follows:-

1). std::string::size() = it returns the total size of the given string which is

   equivalent to the length of the string. Here the size is in terms of

   the no. of bytes required to represent that string irrespective of the

   capacity of the string.

   eg. string str = "hello world"; cout << str.size(); //outputs 11 as the answer

2). std::string::at() = returns the element at index passed as the parameter

    & is equivalent to string_object [index_no.]

    eg. string str = "hello world"; cout << str.at(4) << " " << str[4] //outputs o o

3). std::string::resize() = it resizes the given string to a specified positive      

    value which can be further increased or decreased.

4). std::string::swap() = it simply swaps 2 given strings so that the contents

    of both strings get exchanged without any change in index values of both

   strings => str1.swap(str2); it is equivalent to str2.swap(str1);

References:

for more information about std::string class please visit

for std::string::length()

https://brainly.in/question/5169390

for c strings

https://brainly.in/question/8815677