Wolfram Language & System 10.4 (2016)|Legacy Documentation

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is the head used for real (floatingpoint) numbers.


  • can be used to stand for a real number in a pattern.
  • You can enter a floatingpoint number of any length.
  • You can enter a number in scientific notation by using the form .
  • You can enter a floatingpoint number in base b using . The base must be less than 36. The letters or are used in sequence to stand for digits 10 through 35.
  • Real is also used to indicate an approximate real number in Read.
Introduced in 1988
| Updated in 1996