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Single Data Type
Single (single-precision floating-point) variables are stored as IEEE 32-bit (4-byte) floating-point numbers, ranging in value from -3.402823E38 to -1.401298E-45 for negative values and from 1.401298E-45 to 3.402823E38 for positive values. Single precision numbers store an approximation of a real number. Any other numeric type can be implicitly converted to the Single Data type without error even though for the decimal type, this conversion result in a loss of precision.
Note The Single data type can be converted to the Double or Decimal data type, without encountering an OverflowExceptionerror.
The equivalent NGWS runtime data type is System.Single.