Convert integer to string in C++

David Y.

The Problem

What is the best way to convert an integer to a string in modern C++?

The Solution

C++11 introduced std::to_string, which is designed for this purpose. For example:

#include <string> int main() { int myInt = 123; std::string myIntString = std::to_string(myInt); }

To do the opposite conversion, from a string to an int, we can use std::stoi:

#include <string> #include <iostream> int main() { std::string myString = "123"; int myStringInt = std::stoi(myString); myStringInt += 1; std::cout << myStringInt; // will print 124 }

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