Data Representation Models

Several of the numeric intrinsic functions are defined by a model set for integers (for each intrinsic kind used) and reals (for each real kind used). The bit functions are defined by a model set for bits (binary digits).

The following intrinsic functions provide information on the data representation models:

Intrinsic function	Model	Value returned
BIT_SIZE	Bit	The number of bits (s) in the bit model
DIGITS	Integer or Real	The number of significant digits in the model for the argument
EPSILON	Real	The number that is almost negligible when compared to one
EXPONENT	Real	The value of the exponent part of a real argument
FRACTION	Real	The fractional part of a real argument
HUGE	Integer or Real	The largest number in the model for the argument
MAXEXPONENT	Real	The maximum exponent in the model for the argument
MINEXPONENT	Real	The minimum exponent in the model for the argument
NEAREST	Real	The nearest different machine-representable number in a given direction
PRECISION	Real	The decimal precision (real or complex) of the argument
RADIX	Integer or Real	The base of the model for the argument
RANGE	Integer or Real	The decimal exponent range of the model for the argument
RRSPACING	Real	The reciprocal of the relative spacing near the argument
SCALE	Real	The value of the exponent part (of the model for the argument) changed by a specified value
SET_EXPONENT	Real	The value of the exponent part (of the model for the argument) set to a specified value
SPACING	Real	The value of the absolute spacing of model numbers near the argument
TINY	Real	The smallest positive number in the model for the argument

For more information on the range of values for each data type (and kind), see Data and I/O in the Compiler Reference.