usleep Delay execution in microseconds &reftitle.description; voidusleep intmicro_seconds Delays program execution for the given number of micro seconds. &reftitle.parameters; micro_seconds Halt time in micro seconds. A micro second is one millionth of a second. &reftitle.returnvalues; &return.void; &reftitle.changelog; &Version; &Description; 5.0.0 This function now works on Windows systems. &reftitle.examples; <function>usleep</function> example ]]> &example.outputs; &reftitle.seealso; sleep time_nanosleep time_sleep_until set_time_limit