: Mathématiques: absolute value

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absolute value

In mathematics, the absolute value or modulus of a real number x, denoted |x|, is the non-negative value of x without regard to its sign. Namely, |x| = x if x is a positive number, and |x| = −x if x is negative (in which case negating x makes −x positive), and |0| = 0. For example, the absolute value of 3 is 3, and the absolute value of −3 is also 3. The absolute value of a number may be thought of as its distance from zero.
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Absolute_value)

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