The absolute value of a real number x (symbolized |x|) is the unsigned portion of x<ref>http://mathworld.wolfram.com/AbsoluteValue.html</ref> . The absolute value of x is always greater than or equal to 0. | The absolute value of a real number x (symbolized |x|) is the unsigned portion of x<ref>http://mathworld.wolfram.com/AbsoluteValue.html</ref> . The absolute value of x is always greater than or equal to 0. |