# Index N

    Named common blocks
      See also Common blocks
      agreement of data types in, [+]
      establishing and initializing values in, [+]
    Named constants,  [+]
      definition of, [+]
    Named control constructs,  [+]
      CASE, [+]
      DO, [+]
      IF, [+]
    NAMED specifier
      in INQUIRE statements
         on U*X, WNT, W9*, [+]
         on VMS, [+]
    Namelist external records
      alternative form for, [+]
    Namelist formatting,  [+]
      for READ statements, [+]
      for WRITE statements, [+]
      input, [+]
      output, [+]
    Namelist group,  [+]
      accessibility of, [+]
      example of, [+]
      prompting for information about, [+]
      variables in, [+], [+]
    Namelist input
      comments in, [+]
    Namelist specifier,  [+]
    NAMELIST statement,  [+]
      example of, [+]
    Namelist statements
      ACCEPT, [+]
      PRINT and TYPE, [+]
      READ, [+], [+]
      WRITE, [+], [+]
    Names,  [+]
      See also your user manual or programmer's guide
      associating with constant value, [+]
      associating with group, [+]
      association of, [+]
      association of arguments, [+]
      association of use and host, [+]
      beginning with underscores, [+]
      constants with, [+]
      containing dollar sign, [+]
      examples of, [+]
      explicit typing of variable, [+]
      extension to characters in, [+]
      implicit typing of variable, [+]
      in PARAMETER statement, [+]
      length of, [+]
      of external and dummy procedures as actual arguments, [+] to
        [+]
      of intrinsic procedures as actual arguments, [+]
      of procedures
         established as generic, [+]
         established as specific, [+]
         nonestablished, [+]
      overriding default data typing of, [+]
      rules for constants with, [+]
      scope of, [+]
      uniqueness within programs, [+]
      with global scope, [+]
      with local scope, [+]
      with statement scope, [+]
    NAME specifier
      in INQUIRE statements
         on U*X, WNT, W9*, [+]
         on VMS, [+]
      in OPEN statements
         on U*X, WNT, W9*, [+]
         on VMS, [+]
      interaction with OPEN (FILE)
         on U*X, WNT, W9*, [+]
         on VMS, [+]
    NaN values
      See also your user manual or programmer's guide
      function testing for, [+]
    National Language Support routines
      See NLS routines (WNT, W9*)
    NATIVE value
      for INQUIRE (CONVERT)
         on U*X, WNT, W9*, [+]
         on VMS, [+]
      for OPEN (CONVERT)
         on U*X, WNT, W9*, [+]
         on VMS, [+]
    .NE.
      See Relational operators
      See also your user manual or programmer's guide
    Nearest different number
      function returning, [+]
    NEAREST function,  [+], [+]
    Nearest integer
      function returning, [+]
    Negation
      logical, [+]
    .NEQV.
      See Logical operators
    Nested constructs
      DO, [+]
      IF, [+]
    Nested DO construct
      control transfers in, [+]
    Nested DO loops,  [+]
    Nested format specifications,  [+]
    Nested IF constructs,  [+]
    Nested implied-do lists
      in I/O lists, [+]
    Nesting of OpenMP Fortran parallel directives, [+]
    NEW keyword
      for INDEPENDENT directive (TU*X), [+]
    NEW value
      for OPEN (STATUS)
         on U*X, WNT, W9*, [+]
         on VMS, [+]
    NEXTREC specifier
      in INQUIRE statements
         on U*X, WNT, W9*, [+]
         on VMS, [+]
    NINT function,  [+], [+]
    NLS routines (WNT, W9*),  [+]
    NML specifier,  [+]
    NO_ARG_CHECK keyword
      for ATTRIBUTES directive, [+]
    NOCHECK
      OPTIONS option, [+]
    NODECLARE directive,  [+]
    Nodes
      function returning available number of, [+]
    NOEXTEND_SOURCE
      OPTIONS option, [+]
    NOF77
      OPTIONS option, [+]
    NOFREEFORM directive,  [+]
    NOG_FLOATING (VMS)
      OPTIONS option, [+]
    NOI4
      OPTIONS option, [+]
    NOLIST option (VMS)
      in INCLUDE statement, [+]
    NOMIXED_STR_LEN_ARG keyword
      for ATTRIBUTES directive, [+]
    Nonadvancing I/O,  [+]
      See also your user manual or programmer's guide
    Nonblock DO construct,  [+]
    Nondecimal numeric constants,  [+]
      data type of, [+]
    Nonelemental intrinsic procedures,  [+]
    Nonexecutable statements,  [+]
    Non-Fortran procedures
      argument list functions for, [+]
      in argument list
         defaults for, [+]
      references to, [+]
         See also your user manual or programmer's guide
      referencing with %DESCR function (VMS), [+]
      referencing with %LOC function, [+]
      referencing with %REF function, [+]
      referencing with %VAL function, [+]
    Nonnative floating-point formats
      See also your user manual or programmer's guide
      on U*X, WNT, W9*, [+], [+]
      on VMS, [+], [+]
    NOSEQUENCE directive (TU*X),  [+], [+]
    NOSPANBLOCKS specifier (VMS)
      in OPEN statements, [+]
    NOSTRICT directive,  [+]
    .NOT.
      See Logical operators
      See also your user manual or programmer's guide
    NOT function,  [+], [+], [+]
    NOWAIT keyword (TU*X)
      for END DO directive, [+]
      for END PDO directive, [+]
      for END SECTIONS directive, [+]
      for END SINGLE directive, [+]
    NULL function,  [+], [+]
    NULLIFY statement,  [+]
    NULL value
      for INQUIRE (BLANK)
         on U*X, WNT, W9*, [+]
         on VMS, [+]
      for OPEN (BLANK)
         on U*X, WNT, W9*, [+]
         on VMS, [+]
    Number of processes
      function returning, [+]
    NUMBER specifier
      in INQUIRE statements
         on U*X, WNT, W9*, [+]
         on VMS, [+]
    NUMBER_OF_PROCESSORS function,  [+], [+], [+]
    Numerals
      in character set, [+]
    Numeric and logical type declaration statements,  [+]
    Numeric assignment statements,  [+]
    Numeric constants
      complex, [+]
      integer, [+]
      nondecimal, [+]
      real, [+]
    Numeric editing
      general rules for, [+]
    Numeric expressions,  [+] to [+]
      effects of parentheses within, [+]
      in relational expressions, [+]
      operator precedence in, [+]
      order of evaluation in, [+]
      rules for typing of, [+]
      using in FORMAT statements, [+]
    Numeric functions
      categories of, [+]
      models defining, [+]
    Numeric models
      integer, [+]
      querying parameters in, [+], [+], [+]
      real, [+]
    Numeric nondecimal constants,  [+]
      data type of, [+]
    Numeric operators
      in expressions, [+] to
    Numeric storage unit,  [+]
    Numeric values
      size limits for A editing, [+]
    NWORKERS function,  [+], [+]

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