math.frexp (x)
Returns m and e such that
x=m2e, where e is an integer and the absolute value of
m is in the range [0.5, 1] when x<>0 or
m=0 when x=0.
Returns m and e such that
x=m2e, where e is an integer and the absolute value of
m is in the range [0.5, 1] when x<>0 or
m=0 when x=0.