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.. _arduino-millis:
millis()
========
Description
-----------
Returns the number of milliseconds since the Arduino board began
running the current program. This number will overflow (go back to
zero), after approximately 50 days.
Parameters
----------
None
Returns
-------
Number of milliseconds since the program started (*unsigned long*)
Example
-------
::
unsigned long time;
void setup(){
Serial.begin(9600);
}
void loop(){
Serial.print("Time: ");
time = millis();
//prints time since program started
Serial.println(time);
// wait a second so as not to send massive amounts of data
delay(1000);
}
Tip:
----
Note that the parameter for millis is an unsigned long, errors may
be generated if a programmer tries to do math with other datatypes
such as ints.
See also
--------
- `micros <http://arduino.cc/en/Reference/Micros>`_\ ()
- `delay <http://arduino.cc/en/Reference/Delay>`_\ ()
- `delayMicroseconds <http://arduino.cc/en/Reference/DelayMicroseconds>`_\ ()
- `Tutorial: Blink Without Delay <http://arduino.cc/en/Tutorial/BlinkWithoutDelay>`_
.. include:: cc-attribution.txt
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