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Built-in Mathematica Symbol

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NumberMarks

NumberMarks
is an option for InputForm and related functions that specifies whether ` marks should be included in the printed forms of approximate numbers.

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The default setting for NumberMarks is given by the value of $NumberMarks.

NumberMarks->True indicates that ` should be used in all approximate numbers, both machine-precision and arbitrary-precision ones.

NumberMarks->Automatic indicates that ` should be used in arbitrary-precision but not machine-precision numbers.

NumberMarks->False indicates that ` should never be used in outputting numbers.

Number marks are used to indicate the type of numbers, and their precision or accuracy.

The *^ form for scientific notation is always used in InputForm, and is independent of NumberMarks.

EXAMPLES

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Basic Examples (2)

Machine numbers format without number marks by default:

In[1]:=

Out[1]//InputForm=

The same number with number marks:

In[2]:=

Out[2]//InputForm=

Extended-precision numbers include number marks by default:

In[1]:=

Out[1]//InputForm=

Without number marks:

In[2]:=

Out[2]//InputForm=