The absolute difference of two numbers 
and 
is 
, where the minus sign denotes
subtraction and 
denotes the absolute value.
Absolute Difference
See also
Absolute Square, Absolute Value, DifferenceExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Absolute Difference." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/AbsoluteDifference.html