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$NumberMarks

$NumberMarks
gives the default value for the option NumberMarks, which specifies whether ` marks should be included in the input form representations of approximate numbers.

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The default setting for $NumberMarks is Automatic.

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

$NumberMarks=Automatic indicates that ` should by default be used in arbitrary-precision but not machine-precision numbers.

$NumberMarks=False indicates that ` should by default never be used in outputting numbers.

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NumberForm SetPrecision

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Numerical Precision

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Display of Numbers

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