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NumberFormat
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NumberFormat

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is an option for NumberForm and related functions that specifies how the mantissa, base, and exponent should be assembled into a final print form.

Details

  • With the setting NumberFormat->f, the function f is supplied with three arguments: the mantissa, base and exponent of each number to be printed. »
  • The arguments are all given as strings. »
  • When no exponent is to be printed, the third argument is given as "". »
  • The function f must return the final format for the number.

Examples

open allclose all

Basic Examples  (1)Summary of the most common use cases

Display numbers in a Fortran‐like form:

In[1]:=1
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https://wolfram.com/xid/0j47cc6a-jg3e9k
Out[1]=1
In[2]:=2
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https://wolfram.com/xid/0j47cc6a-udll3

Display only the mantissas:

In[3]:=3
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https://wolfram.com/xid/0j47cc6a-dozqkd

Display the exponents after converting to scientific form:

In[4]:=4
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https://wolfram.com/xid/0j47cc6a-dctwsg

Scope  (3)Survey of the scope of standard use cases

Use NumberFormat with PaddedForm:

In[1]:=1
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https://wolfram.com/xid/0j47cc6a-g5rvj7
Out[1]=1
In[2]:=2
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https://wolfram.com/xid/0j47cc6a-nybnce

EngineeringForm:

In[3]:=3
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https://wolfram.com/xid/0j47cc6a-ciugnb

ScientificForm:

In[4]:=4
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https://wolfram.com/xid/0j47cc6a-l8ac2d

AccountingForm:

In[5]:=5
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https://wolfram.com/xid/0j47cc6a-c1lgvr

Display numbers as lists containing the mantissa, base, and exponent:

In[1]:=1
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https://wolfram.com/xid/0j47cc6a-9l7g7

Do the same for ScientificForm:

In[2]:=2
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https://wolfram.com/xid/0j47cc6a-p76cv

The arguments are strings:

In[1]:=1
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https://wolfram.com/xid/0j47cc6a-bjxlzk

If there is no exponent, the third argument is an empty string:

In[2]:=2
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https://wolfram.com/xid/0j47cc6a-jnpqei
Wolfram Research (1991), NumberFormat, Wolfram Language function, https://reference.wolfram.com/language/ref/NumberFormat.html.
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Wolfram Research (1991), NumberFormat, Wolfram Language function, https://reference.wolfram.com/language/ref/NumberFormat.html.

Text

Wolfram Research (1991), NumberFormat, Wolfram Language function, https://reference.wolfram.com/language/ref/NumberFormat.html.

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Wolfram Research (1991), NumberFormat, Wolfram Language function, https://reference.wolfram.com/language/ref/NumberFormat.html.

CMS

Wolfram Language. 1991. "NumberFormat." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/NumberFormat.html.

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Wolfram Language. 1991. "NumberFormat." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/NumberFormat.html.

APA

Wolfram Language. (1991). NumberFormat. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/NumberFormat.html

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Wolfram Language. (1991). NumberFormat. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/NumberFormat.html

BibTeX

@misc{reference.wolfram_2025_numberformat, author="Wolfram Research", title="{NumberFormat}", year="1991", howpublished="\url{https://reference.wolfram.com/language/ref/NumberFormat.html}", note=[Accessed: 08-July-2025 ]}

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@misc{reference.wolfram_2025_numberformat, author="Wolfram Research", title="{NumberFormat}", year="1991", howpublished="\url{https://reference.wolfram.com/language/ref/NumberFormat.html}", note=[Accessed: 08-July-2025 ]}

BibLaTeX

@online{reference.wolfram_2025_numberformat, organization={Wolfram Research}, title={NumberFormat}, year={1991}, url={https://reference.wolfram.com/language/ref/NumberFormat.html}, note=[Accessed: 08-July-2025 ]}

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@online{reference.wolfram_2025_numberformat, organization={Wolfram Research}, title={NumberFormat}, year={1991}, url={https://reference.wolfram.com/language/ref/NumberFormat.html}, note=[Accessed: 08-July-2025 ]}