++ (Self-add)

++ (Self-add)

• Description

Increasing or decreasing a variable

• Syntax

 
x++;  //x self-adds 1, and return the original value of x.
++x;  // x self-adds 1, and return the new value of x.
 
x--;  // x self-decreases 1, and return the original value of x.
--x;  //x self-decreases 1, and return the new value of x. 

• Parameters

x: in or long（maybe unsigned）

Return

The original or new value after the self-addition or self-decrease of a variable.

• Example

x = 2;
y = ++x;      // Now, x=3, y=3
y = x--;      // Now, x=2, y=3

[Return to Arduino Syntax Manual]