WOLFRAM

Wolfram Language & System Documentation Center

"SemanticReal" (Interpreter Type)

Natural-language name of a real number.

Details

Allowed Forms

  • 1234, -1234, etc.integers
    12.34real numbers
    12.45e45, 1.2E-5, 1.2*^-5numbers in scientific notation
    12,345.67numbers with separators
    1.2`10, 3.4``20numbers with a given Precision or Accuracy
    two, a fifthnumbers in natural language
    3/5, -1/2rational numbers

Restriction Specifications

Interpretation

Examples

Basic Examples  (3)

Interpret real numbers:

Wolfram Language code: Interpreter["SemanticReal"]["3.1415"]
Wolfram Language code: Interpreter["SemanticReal"]["3.*^4"]
Wolfram Language code: Interpreter["SemanticReal"]["1.23456e3"]

Interpret real numbers in natural language:

Wolfram Language code: Interpreter["SemanticReal"]["two thirds"]
Wolfram Language code: Interpreter["SemanticReal"]["minus six"]

Restrict in a range:

Wolfram Language code: Interpreter[Restricted["SemanticReal", {0, 1}]][{"1/3", "5/3"}]

Restrict to multiples of 1/2 between 1 and 4:

Wolfram Language code: Interpreter[Restricted["SemanticReal", {1, 4, .5}]][{"3/2", "15/2"}]

Set the precision:

Wolfram Language code: Interpreter[Restricted["SemanticReal", Automatic, 10]]["one third"]

Otherwise, $MachinePrecision is implied:

Wolfram Language code: Interpreter["SemanticReal"]["one third"]//Precision

When the number contains a Precision or Accuracy, and a precision restriction is also specified, the lower of the two will be applied:

Wolfram Language code: Interpreter[Restricted["SemanticReal", Automatic, 3]]["1.23456789`8"]
Wolfram Language code: Interpreter[Restricted["SemanticReal", Automatic, 2]]["1.23456789``10"]