std::basic_string::operator[] in C++

std::basic_string::operator[] in C++

Last Updated : 14 Jul, 2017

Returns a reference to the character at specified location pos. No bounds checking is performed. If pos > size(), the behavior is undefined. Syntax :

reference operator[] (size_type pos);
const_reference operator[] (size_type pos) const;
Parameters :
pos - position of the character to return
Return value :
Reference to the requested character
Exceptions :
No exception is thrown

CPP

/* CPP program to access
   a character through
   std::basic_string::operator[] */
#include <iostream>

//Driver code
int main()
{
    //String with valid indices from 0 to 2
    std::string str = "abc";

    //Printing size of string
    std::cout << "string size = " << str.size() << '\n';
    
    //Accessing element at index 2
    std::cout << "Element : " << str[2];
}

Output

string size = 3
Element : c

std::basic_string::operator[] in C++

R

Rohit Thapliyal

Improve

Article Tags :

Practice Tags :

Similar Reads

std::basic_string::at in C++

Returns a reference to the character at the specified location pos. The function automatically checks whether pos is the valid position of a character in the string (i.e., whether pos is less than the string length), throwing an out_of_range exception if it is not. Syntax: reference at (size_type po

std::basic_string::max_size in C++

std::basic_string::max_size is used to compute the maximum number of elements the string is able to hold due to system or library implementation limitations. size_type max_size() const; Parameters : None Return value : Maximum number of characters Exceptions : None CPP // CPP program to compute the

std::string::push_back() in C++

The std::string::push_back() method in C++ is used to append a single character at the end of string. It is the member function of std::string class defined inside <string> header file. In this article, we will learn about std::string::push_back() method in C++.Example:C++// C++ Program to ill

std::string::assign() in C++

The member function assign() is used for the assignments, it assigns a new value to the string, replacing its current contents. Syntax 1: Assign the value of string str. string& string::assign (const string& str) str : is the string to be assigned. Returns : *this CPP // CPP code for assign

std::basic_string::at vs std::basic_string::operator[]

std::basic_string::at, std::basic_string::operator[]Both at() and operator[] can be used to access an element in the string. But there exists one difference between them on how to handle exceptional condition when pos>=size. std::basic_string::at throws std::out_of_range if pos >= size().std::