gives a list containing the mantissa and exponent of a number x.
MantissaExponent[x,b]
gives the base‐b mantissa and exponent of x.


MantissaExponent
gives a list containing the mantissa and exponent of a number x.
MantissaExponent[x,b]
gives the base‐b mantissa and exponent of x.
Details

- The mantissa always lies between
and
or
and
.
- MantissaExponent works with exact as well as approximate numeric quantities.
Examples
open all close allBasic Examples (1)
Scope (4)
Properties & Relations (3)
MantissaExponent is related to RealExponent:
If r=RealExponent[x,b] then and
:
RealDigits gives the mantissa in terms of digits:
This is equal to the values given by MantissaExponent:
Tech Notes
Related Guides
History
Introduced in 1991 (2.0) | Updated in 1999 (4.0) ▪ 2000 (4.1) ▪ 2002 (4.2)
Text
Wolfram Research (1991), MantissaExponent, Wolfram Language function, https://reference.wolfram.com/language/ref/MantissaExponent.html (updated 2002).
CMS
Wolfram Language. 1991. "MantissaExponent." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2002. https://reference.wolfram.com/language/ref/MantissaExponent.html.
APA
Wolfram Language. (1991). MantissaExponent. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/MantissaExponent.html
BibTeX
@misc{reference.wolfram_2025_mantissaexponent, author="Wolfram Research", title="{MantissaExponent}", year="2002", howpublished="\url{https://reference.wolfram.com/language/ref/MantissaExponent.html}", note=[Accessed: 08-August-2025]}
BibLaTeX
@online{reference.wolfram_2025_mantissaexponent, organization={Wolfram Research}, title={MantissaExponent}, year={2002}, url={https://reference.wolfram.com/language/ref/MantissaExponent.html}, note=[Accessed: 08-August-2025]}