======abs(x)   ======

====Description   ====

Computes the absolute value of a number.

====Parameters   ====

x: the number

====Returns   ====

**x**: if **x** is greater than or equal to 0.

**-x**: if **x** is less than 0.


====Warning   ====
Because of the way the abs() function is implemented, avoid using other functions inside the brackets, it may lead to incorrect results.

<code arduino>
abs(a++);   // avoid this - yields incorrect results

a++;          // use this instead -
abs(a);       // keep other math outside the function
</code>




Source: arduino.cc