Just looking at the reference section for the abs() function and it tells me that abs() does the following; 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. Well, blow me down, I'm guessing…

Arduino Reference - abs()

PGTBOOS April 7, 2015, 11:09am 7

note that 0/0 is not allowed it doesnt go wrong on abs() its the line before it.

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