div() function in C++

string at() in C++

Last Updated : 04 Oct, 2024

The std::string::at() in C++ is a built-in function of std::string class that is used to extract the character from the given index of string. In this article, we will learn how to use string::at() in C++.

Syntax

str.at(idx)

Parameters

idx: Index at which we have to find the character.

Return Value

Returns the character at the given index of the string.
If the given index is less than 0 or greater than equal to the length of string, then it throws an out_of_range exception.

Example of string::at()

C++

// C++ Program to show, how to use string::at()
// for extracting the character from given index
#include <bits/stdc++.h>
using namespace std;

int main() {
    string str("GeeksForGeeks");

    // Extracting the character of 0th index
    cout << str.at(0) << endl;

    // Extracting the character of 5th index
    cout << str.at(5) << endl;

    // Extracting the character of 9th index
    cout << str.at(9) << endl;

    return 0;
}

Output

G
F
e

Time Complexity: O(1)
Auxiliary Space: O(1)

div() function in C++

GeeksforGeeks

Improve

Article Tags :

Practice Tags :

Similar Reads

In C++, strings are sequences of characters that are used to store words and text. They are also used to store data, such as numbers and other types of information in the form of text. Strings are provided by <string> header file in the form of std::string class. Creating a StringCreating a st

Substring in C++

The substring function is used for handling string operations like strcat(), append(), etc. It generates a new string with its value initialized to a copy of a sub-string of this object. In C++, the header file which is required for std::substr(), string functions is <string>. The substring fu

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

string find() in C++

In C++, string find() is a built-in library function used to find the first occurrence of a substring in the given string. Letâ€™s take a look at a simple example that shows the how to use this function: [GFGTABS] C++ #include <bits/stdc++.h> using namespace std; int main() { string s = "We

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

The string::append() in C++ is used append the characters or the string at the end of the string. It is the member function of std::string class . The string::append() function can be used to do the following append operations: Table of Content Append a Whole StringAppend a Part of the StringAppend

string erase in C++

The string erase() function is a built-in function of the string class that is used to erase the whole or part of the string, shortening its length. The function provides different ways to delete a portion of a string based on either an index position or a range of characters or delete the whole str

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

The data() function writes the characters of the string into an array. It returns a pointer to the array, obtained from conversion of string to the array. Its Return type is not a valid C-string as no '\0' character gets appended at the end of array. Syntax: const char* data() const; char* is the po

Arrays and Strings in C++

Arrays An array in C or C++ is a collection of items stored at contiguous memory locations and elements can be accessed randomly using indices of an array. They are used to store similar types of elements as in the data type must be the same for all elements. They can be used to store the collection

std::string class in C++

C++ has in its definition a way to represent a sequence of characters as an object of the class. This class is called std:: string. The string class stores the characters as a sequence of bytes with the functionality of allowing access to the single-byte character. String vs Character ArrayString Ch

std::to_string in C++

In C++, the std::to_string function is used to convert numerical values into the string. It is defined inside <string> header and provides a simple and convenient way to convert numbers of any type to strings. In this article, we will learn how to use std::to_string() in C++. Syntaxstd::to_str