Computes the absolute value of a number.
x: the number
x: if x is greater than or equal to 0.
-x: if x is less than 0.
Because of the way the abs() function is implemented, avoid using other functions inside the brackets, it may lead to incorrect results.
Corrections, suggestions, and new documentation should be posted to the Forum.
The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.