Round
 Usage
• Round[x] gives the integer closest to x.
Notes
• Mathematical function (see Section A.3.10). • Round rounds numbers of the form x.5 toward the nearest even integer. • Round[x] returns an integer when x is any numeric quantity, whether or not it is an explicit number. • Example: Round[Pi^2]  . • For exact numeric quantities, Round internally uses numerical approximations to establish its result. This process can be affected by the setting of the global variable $MaxExtraPrecision. • New in Version 1; modified in 3.
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