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C:\_32\C>perl -e "print 0.5 ** 0.5" 0.707106781186548 ... 0.999999999997007 C:\_32\C>perl -e "print 0.0000000000000001 ** 0.0000000000000001" 0.999999999999996
C:\_32\C>perl -MMath::Complex -e "$z = cplx(0, 1); print $z ** 0" 1