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<p class='vspace'></p><h2>millis()</h2>
<h4>Description</h4>
<p>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.
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<p class='vspace'></p><h4>Parameters</h4>
<p>None
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<p class='vspace'></p><h4>Returns</h4>
<p>Number of milliseconds since the program started (<em>unsigned long</em>)
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<p class='vspace'></p><h4>Example</h4>
<pre>
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);
}
</pre>
<p class='vspace'></p><h4>Tip:</h4>
<p>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.
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<p class='vspace'></p><h4>See also</h4>
<ul><li><a class='wikilink' href='Micros.html'>micros</a>()
</li><li><a class='wikilink' href='Delay.html'>delay</a>()
</li><li><a class='wikilink' href='DelayMicroseconds.html'>delayMicroseconds</a>()
</li><li><a class='urllink' href='http://arduino.cc/en/Tutorial/BlinkWithoutDelay' rel='nofollow'>Tutorial: Blink Without Delay</a>
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