E to F
- ELEMENTAL
Keyword: Asserts that a user-defined procedure is a restricted form of pure procedure.
- ELLIPSE, ELLIPSE_W (W*S)
Graphics Functions: Draw a circle or an ellipse using the current graphics color.
- ELSE Statement
Statement: Marks an optional branch in an IF Construct.
- ELSE Directive
Statement: Marks an optional branch in an IF Directive Construct.
- ELSEIF Directive
Statement: Marks an optional branch in an IF Directive Construct.
- ELSE IF
Statement: Marks an optional branch in an IF Construct.
- ELSE WHERE
Statement: Marks the beginning of an ELSE WHERE block within a WHERE construct.
- ENCODE
Statement: Translates data from internal (binary) form to character form. It is comparable to using internal files in formatted sequential WRITE statements.
- END
Statement: Marks the end of a program unit. It takes one of the following forms:
- END DO
Statement: Marks the end of a DO or DO WHILE loop.
- ENDIF Directive
Statement: Marks the end of an IF Directive Construct.
- END IF
Statement: Marks the end of an IF Construct.
- ENDFILE
Statement: For sequential files, writes an end-of-file record to the file and positions the file after this record (the terminal point). For direct access files, truncates the file after the current record.
- END FORALL
Statement: Marks the end of a FORALL construct.
- END INTERFACE
Statement: Marks the end of an INTERFACE block.
- END TYPE
Statement: Specifies the end of a derived type TYPE statement.
- END WHERE
Statement: Marks the end of a WHERE construct.
- ENTRY
Statement: Provides one or more entry points within a subprogram. It is not executable and must precede any CONTAINS statement (if any) within the subprogram.
- EOF
Inquiry Intrinsic Function (Generic): Checks whether a file is at or beyond the end-of-file record.
- EOSHIFT
Transformational Intrinsic Function (Generic): Performs an end-off shift on a rank-one array, or performs end-off shifts on all the complete rank-one sections along a given dimension of an array of rank two or greater. Elements are shifted off at one end of a section and copies of a boundary value are filled in at the other end. Different sections can have different boundary values and can be shifted by different amounts and in different directions.
- EPSILON
Inquiry Intrinsic Function (Generic): Returns a positive model number that is almost negligible compared to unity in the model representing real numbers.
- EQUIVALENCE
Statement: Specifies that a storage area is shared by two or more objects in a program unit. This causes total or partial storage association of the objects that share the storage area.
- ERF
Elemental Intrinsic Function (Generic): Returns the error function of an argument.
- ERFC
Elemental Intrinsic Function (Generic): Returns the complementary error function of an argument.
- ERFC_SCALED
Elemental Intrinsic Function (Generic): Returns the scaled complementary error function of an argument.
- ERRSNS
Intrinsic Subroutine (Generic): Returns information about the most recently detected I/O system error condition. Intrinsic subroutines cannot be passed as actual arguments.
- ESTABLISHQQ
Portability Function: Lets you specify a routine to handle errors detected by the Run-Time Library (RTL). It lets you take appropriate steps in addition to the RTL's error-handling behavior, or it lets you replace that behavior.
- ETIME
Portability Function: On single processor systems, returns the elapsed CPU time, in seconds, of the process that calls it. On multi-core or multi-processor systems, returns the elapsed wall-clock time, in seconds.
- EXIT Statement
Statement: Terminates execution of a DO construct.
- EXIT Subroutine
Intrinsic Subroutine (Generic): Terminates program execution, closes all files, and returns control to the operating system. Intrinsic subroutines cannot be passed as actual arguments.
- EXP
Elemental Intrinsic Function (Generic): Computes an exponential value.
- EXPONENT
Elemental Intrinsic Function (Generic): Returns the exponent part of the argument when represented as a model number.
- EXTENDS_TYPE_OF
Inquiry Intrinsic Function (Generic): Inquires whether the dynamic type of an object is an extension type of the dynamic type of another object.
- EXTERNAL
Statement and Attribute: Allows an external procedure, a dummy procedure, a procedure pointer, or a block data subprogram to be used as an actual argument. (To specify intrinsic procedures as actual arguments, use the INTRINSIC attribute.)
- FDATE
Portability Function and Subroutine: Returns the current date and time as an ASCII string.
- FGETC
Portability Function: Reads the next available character from a file specified by a Fortran unit number.
- FIND
Statement: Positions a direct access file at a particular record and sets the associated variable of the file to that record number. It is comparable to a direct access READ statement with no I/O list, and it can open an existing file. No data transfer takes place.
- FINDFILEQQ
Portability Function: Searches for a specified file in the directories listed in the path contained in the environment variable.
- FIRSTPRIVATE
Parallel Directive Clause: Provides a superset of the functionality provided by the PRIVATE clause. It declares one or more variables to be private to each thread in a team, and initializes each of them with the value of the corresponding original variable.
- FIXEDFORMLINESIZE
General Compiler Directive: Sets the line length for fixed-form Fortran source code.
- FLOAT
Elemental Intrinsic Function (Generic): Converts an integer to REAL(4).
- FLOODFILL, FLOODFILL_W (W*S)
Graphics Functions: Fill an area using the current color index and fill mask.
- FLOODFILLRGB, FLOODFILLRGB_W (W*S)
Graphics Functions: Fill an area using the current Red-Green-Blue (RGB) color and fill mask.
- FLOOR
Elemental Intrinsic Function (Generic): Returns the greatest integer less than or equal to its argument.
- FLUSH Directive
OpenMP* Fortran Compiler Directive: Identifies synchronization points at which the threads in a team must provide a consistent view of memory.
- FLUSH Statement
Statement: Causes data written to a file to become available to other processes or causes data written to a file outside of Fortran to be accessible to a READ statement. It takes one of the following forms:
- FLUSH Subroutine
Portability Subroutine: Flushes the contents of an external unit buffer into its associated file.
- FMA and NOFMA
General Compiler Directives: FMA tells the compiler to allow generation of fused multiply-add (FMA) instructions, also known as floating-point contractions. NOFMA disables the generation of FMA instructions.
- FOCUSQQ (W*S)
QuickWin Function: Sets focus to the window with the specified unit number.
- FOR_DESCRIPTOR_ASSIGN (W*S)
Run-Time Subroutine: Creates an array descriptor in memory.
- FOR_GET_FPE
Run-Time Function: Returns the current settings of floating-point exception flags. This routine can be called from a C or Fortran program.
- for_rtl_finish_
Run-Time Function: Cleans up the Fortran run-time environment; for example, flushing buffers and closing files. It also issues messages about floating-point exceptions, if any occur.
- for_rtl_init_
Run-Time Subroutine: Initializes the Fortran run-time environment and causes Fortran procedures and subroutines to behave the same as when called from a Fortran main program. On Linux* OS and OS X*, it also establishes handlers and floating-point exception handling.
- FOR_SET_FPE
Run-Time Function: Sets the floating-point exception flags. This routine can be called from a C or Fortran program.
- FOR_SET_REENTRANCY
Run-Time Function: Controls the type of reentrancy protection that the Fortran Run-Time Library (RTL) exhibits. This routine can be called from a C or Fortran program.
- FORALL
Statement and Construct: The FORALL statement and construct is an element-by-element generalization of the masked array assignment in the WHERE statement and construct. It allows more general array shapes to be assigned, especially in construct form.
- FORMAT
Statement: Specifies the form of data being transferred and the data conversion (editing) required to achieve that form.
- FP_CLASS
Elemental Intrinsic Function (Generic): Returns the class of an IEEE* real (S_floating, T_floating, or X_floating) argument. This function cannot be passed as an actual argument.
- FPUTC
Portability Function: Writes a character to the file specified by a Fortran external unit, bypassing normal Fortran input/output.
- FRACTION
Elemental Intrinsic Function (Generic): Returns the fractional part of the model representation of the argument value.
- FREE
Intrinsic Subroutine (Specific): Frees a block of memory that is currently allocated. Intrinsic subroutines cannot be passed as actual arguments.
- FREEFORM and NOFREEFORM
General Compiler Directives: FREEFORM specifies that source code is in free-form format. NOFREEFORM specifies that source code is in fixed-form format.
- FSEEK
Portability Function: Repositions a file specified by a Fortran external unit.
- FSTAT
Portability Function: Returns detailed information about a file specified by a external unit number.
- FTELL, FTELLI8
Portability Functions: Return the current position of a file.
- FULLPATHQQ
Portability Function: Returns the full path for a specified file or directory.
- FUNCTION
Statement: The initial statement of a function subprogram. A function subprogram is invoked in an expression and returns a single value (a function result) that is used to evaluate the expression.