Decrements the value of a variable by 1.
x--; // decrement x by one and returns the old value of x --x; // decrement x by one and returns the new value of x
x: variable. Allowed data types:
long (possibly unsigned).
The original or newly decremented value of the variable.
x = 2; y = --x; // x now contains 1, y contains 1 y = x--; // x contains 0, but y still contains 1
The text of the 86Duino reference is a modification of the Arduino reference and is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.