Intel® Fortran Compiler Classic and Intel® Fortran Compiler Developer Guide and Reference

ID 767251
Date 3/31/2023
Public

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Document Table of Contents

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.