< cpp‎ | thread
Defined in header <thread>
template< class Rep, class Period >
void sleep_for( const std::chrono::duration<Rep, Period>& sleep_duration );
(since C++11)

Blocks the execution of the current thread for at least the specified sleep_duration.

This function may block for longer than sleep_duration due to scheduling or resource contention delays.

The standard recommends that a steady clock is used to measure the duration. If an implementation uses a system clock instead, the wait time may also be sensitive to clock adjustments.


sleep_duration - time duration to sleep

Return value



Any exception thrown by clock, time_point, or duration during the execution (clocks, time points, and durations provided by the standard library never throw).


#include <iostream>
#include <chrono>
#include <thread>
int main()
    using namespace std::chrono_literals;
    std::cout << "Hello waiter\n" << std::flush;
    auto start = std::chrono::high_resolution_clock::now();
    auto end = std::chrono::high_resolution_clock::now();
    std::chrono::duration<double, std::milli> elapsed = end-start;
    std::cout << "Waited " << elapsed.count() << " ms\n";

Possible output:

Hello waiter
Waited 2000.12 ms

See also

stops the execution of the current thread until a specified time point