Sentry Answers>C++>

Convert integer to string in C++

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:

Click to Copy
#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:

Click to Copy
#include <string>
#include <iostream>

int main() {
    std::string myString = "123";
    int myStringInt = std::stoi(myString);
    myStringInt += 1;
    std::cout << myStringInt; // will print 124
}
  • SentryC++ Error Monitoring (opens in a new tab)
  • Syntax.fmListen to the Syntax Podcast (opens in a new tab)
  • Syntax.fm logo
    Listen to the Syntax Podcast (opens in a new tab)

    Tasty treats for web developers brought to you by Sentry. Get tips and tricks from Wes Bos and Scott Tolinski.

    SEE EPISODES

Considered “not bad” by 4 million developers and more than 150,000 organizations worldwide, Sentry provides code-level observability to many of the world’s best-known companies like Disney, Peloton, Cloudflare, Eventbrite, Slack, Supercell, and Rockstar Games. Each month we process billions of exceptions from the most popular products on the internet.

learn more about sentry (opens in a new tab)join our discord (opens in a new tab)