FractionalPart
 Usage
• FractionalPart[x] gives the fractional part of x.
Notes
• Mathematical function (see Section A.3.10). • FractionalPart[x] in effect takes all digits to the right of the decimal point and drops the others. • FractionalPart[x] + IntegerPart[x] is always exactly x. • FractionalPart[x] yields a result when x is any numeric quantity, whether or not it is an explicit number. • Example: FractionalPart[Pi^2]  . • For exact numeric quantities, FractionalPart internally uses numerical approximations to establish its result. This process can be affected by the setting of the global variable $MaxExtraPrecision. • New in Version 3.
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