DocumentationMathematicaBuilt-in FunctionsNumerical ComputationComplex Numbers
Re
Re[z] gives the real part of the complex number z.
Re[expr] is left unevaluated if expr is not a numeric quantity. See Section 1.1.5 and Section 3.2.2. See also: Im, Abs, Arg, ComplexExpand. New in Version 1.
Further Examples