Glossary U
- ultimate
component
- For a derived type or a structure, a component that is of intrinsic
type or has the POINTER attribute, or an
ultimate component of a component
that is a derived type and does not have the POINTER attribute.
- unary operator
- An operator that operates on one operand. For example, the minus sign
in -A and the .NOT. operator in .NOT. (J .GT. K).
- undefined
- For a data object, the property of not having a determinate value.
- underflow
- An error condition occurring when the result of an arithmetic operation
yields a result that is smaller than the minimum value in the range of
a data type. For example, in unsigned arithmetic, underflow occurs when
a result is negative. See also denormalized
number.
- unformatted
data
- Data written to a file by using unformatted I/O statements; for example,
binary numbers.
- unformatted
I/O statement
- An I/O statement that does not contain format specifiers and therefore
does not translate the data being transferred. Contrast with
formatted
I/O statement.
- unformatted
record
- A record that is transmitted in internal format between internal and
external storage.
- unit identifier
- The identifier that specifies an external unit or internal file. The
identifier can be any one of the following:
- An integer expression whose value must be zero or positive
- An asterisk (*) that corresponds to the default (or implicit) I/O unit
- The name of a character scalar memory reference or character array
name reference for an internal file
- Also called a device code, or logical unit number.
- unspecified
storage unit
- A unit of storage for holding a pointer or a scalar that is not a pointer
and is of type other than default integer, default character, or default
real.
- use association
- The process by which the entities in a module are made accessible to
other scoping units (through a USE statement in the scoping unit).
- user-defined
type
- See derived type.