The absolute value of a number is a measure of its distance from zero on a number line, regardless of direction. It is always a non-negative value. Mathematically, the absolute value of a number \( x \) is denoted as \( |x| \). The definition can be summarized as follows: - If \( x \) is a positive number or zero, then \( |x| = x \).
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For a real number , its absolute value is when and otherwise; for a complex number , it is the nonnegative magnitude .