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.. highlight:: cpp
.. _lang-millis:
millis()
========
Returns the number of milliseconds since the Maple board began running
the current program. This number will overflow (go back to zero) after
approximately 50 days.
Library Documentation
---------------------
.. doxygenfunction:: millis
Example
-------
The following time prints the value returned by ``millis()`` roughly
once per second::
unsigned int time;
void setup() {
}
void loop() {
SerialUSB.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
---
Since the return value for ``millis()`` is an :ref:`unsigned long
<lang-unsignedlong>`, overflow errors may occur if you try to do math
with other data types, such as :ref:`ints <lang-int>`.
See Also
--------
- :ref:`micros <lang-micros>`
- :ref:`delay <lang-delay>`
- :ref:`delayMicroseconds <lang-delaymicroseconds>`
.. include:: cc-attribution.txt
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