# <thread>

**[<thread>](https://en.cppreference.com/w/cpp/header/thread)** provides `std::thread` for creating and managing threads, and `std::jthread` (C++20) which automatically joins on destruction. Create a thread by passing a callable and arguments; join to wait for completion.

Use `std::jthread` in new code when available; it prevents accidental detached threads.

## Example

This example creates two threads that run concurrently, each printing a message, then waits for both to complete.

```cpp
// compile: g++ -std=c++11 -pthread -o threadexample threadexample.cpp
// run: ./threadexample
// description: create and join threads

#include <thread>
#include <iostream>

void worker(int id) {
    std::cout << "thread " << id << " working\n";
}

int main() {
    std::thread t1(worker, 1);
    std::thread t2(worker, 2);
    
    t1.join();
    t2.join();
    
    std::cout << "all threads done\n";
    
    return 0;
}
```