Mathematica 9 is now available
THIS IS DOCUMENTATION FOR AN OBSOLETE PRODUCT.
SEE THE DOCUMENTATION CENTER FOR THE LATEST INFORMATION.
Mathematica > Mathematics and Algorithms > Numerical Evaluation & Precision > Representation of Numbers > MantissaExponent >
Mathematica > Core Language > Expressions > Expression Structure > Atomic Elements of Expressions > Representation of Numbers > MantissaExponent >

MantissaExponent

MantissaExponent[x]
gives a list containing the mantissa and exponent of a number x.
MantissaExponent
gives the base-b mantissa and exponent of x.
  • The mantissa always lies between and or and .
In[1]:=
Click for copyable input
Out[1]=
In[2]:=
Click for copyable input
Out[2]=
Integers:
Base 2:
Exact numeric quantities:
The precision of the mantissa will depend on the precision of the inputs:
The fundamental identity :
If r=RealExponent[x, b] then and :
RealDigits gives the mantissa in terms of digits:
The mantissa is given by :
This is equal to the values given by MantissaExponent:
New in 2 | Last modified in 4
Ask a question about this page  |  Suggest an improvement  |  Leave a message for the team
Format:   HTML  |  CDF