Intel(R) Fortran Language Reference (online version)

Intel Fortran Language Reference
Chapter 3
Data Types, Constants, and Variables
Intrinsic Data Types ................................................................................... 3-2
Integer Data Types................................................................................ 3-4
Real Data Types.................................................................................... 3-6
General Rules for Real Constants.................................................... 3-7
REAL(4) Constants .......................................................................... 3-8
REAL(8) or DOUBLE PRECISION Constants ................................. 3-9
REAL(16) Constants ...................................................................... 3-10
Complex Data Types........................................................................... 3-10
General Rules for Complex Constants........................................... 3-11
COMPLEX(4) Constants ................................................................ 3-11
COMPLEX(8) or DOUBLE COMPLEX Constants ......................... 3-12
COMPLEX(16) Constants .............................................................. 3-13
Logical Data Types.............................................................................. 3-14
Character Data Type........................................................................... 3-14
C Strings in Character Constants................................................... 3-16
Character Substrings .................................................................... 3-17
Derived Data Types ................................................................................. 3-19
Derived-Type Definition....................................................................... 3-20
Default Initialization............................................................................. 3-22
Structure Components........................................................................ 3-23
Structure Constructors........................................................................ 3-26
Binary, Octal, Hexadecimal, and Hollerith Constants .............................. 3-28
Binary Constants ................................................................................ 3-28
Octal Constants .................................................................................. 3-29
Hexadecimal Constants ...................................................................... 3-29
Hollerith Constants ............................................................................. 3-30
Determining the Data Type of Nondecimal Constants ........................ 3-31
Variables.................................................................................................. 3-33
Data Types of Scalar Variables ........................................................... 3-34
Specification of Data Type.............................................................. 3-34
Implicit Typing Rules ...................................................................... 3-35
Arrays.................................................................................................. 3-35
Whole Arrays.................................................................................. 3-38
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