Operator precedence

This example is for Wiring version 1.0 build 0100+. If you have a previous version, use the examples included with your software. If you see any errors or have comments, please let us know.


The modulo operator (%) returns the remainder of a number divided by another. As in this example, it is often used to keep numerical values within a set range.

int num = 0;

void setup()

void loop()
  num = (num + 1) % 10;  // num goes from 0 to 9
  Serial.println(num, DEC);