Wolfram Language & System 10.3 (2015)|Legacy Documentation

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gives the integer closest to x.

rounds to the nearest multiple of a.


  • Mathematical function, suitable for both symbolic and numerical manipulation.
  • 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.
  • 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.
  • Round applies separately to real and imaginary parts of complex numbers.
  • Round automatically threads over lists.
Introduced in 1988
| Updated in 2007