1INCLAN: special characters - $ % { } ( ) ; : \ " ' # @ ! ^

The following characters have a special meaning for Inclan. To use them
literally, they usually must be preceded by a backslash.

$    "$variable" substitutes the value of the variable in the command
      line. Substitutions proceed from left to right. If the value of
      the variable or function call starts and ends with single quotes
      (i.e. if it is a Fortran-77 character string), the delimiting
      single quotes are removed before inserting the value.

%     "%variable" substitutes the value of the variable in the command
      line. Substitutions proceed from left to right. Single quotes that
      delimit Fortran-77 character strings are retained.

{ }   The curly braces in "{$variable}" or "{%variable}" separate the
      variable name variable from immediately following text.
      "${expression}" or "%{expression}" substitute the result value
      of the FORTRAN-77 expression.

( )   "$variable(format)" uses the given FORTRAN-77 format to convert
      the numeric value of a variable into the string that is substituted
      in the command line. If the value of the variable is a comma-separated
      list, "$variable(n)", where n is an integer expression, substitutes
      with the n-th element of this list. "$variable(m:n)", where m and n
      are integer expressions, substitutes with the substring between
      positions m and n of the value of the variable. These three possible
      uses of parentheses cannot be used simultaneously.

;     separates commands that stand on the same line. Note, however, that
      commands that form blocks (e.g. do ... end do, if ... end if) must
      always appear as the first command on a line.

:     "Label:" denotes a label that can be used as the target of a jump.

\     "\c" treats the character c literally and allows the use of special
      characters in normal text, "\" at the end of a line indicates that
      the statement continues on the following line.

"     "text" treats text as a single parameter, even if it contains spaces.
      Variable substitutions in the text still occur.

'     'text' treats text as a single parameter; the single quotes remain
      part of the text. Single quotes are used to delimit FORTRAN-77
      character string constants. Variable substitutions in the text
      still occur.

#     Text between a comment sign "#" and the end of the line is treated
      as a comment and skipped by the program.

@     Commands preceded by "@" are only echoed if the variable echo has
      the value full. "@" has its special meaning only if it occurs as
      the first character of a command.

!     "!string" recalls the last interactive command that started with
      "string". "!" has its special meaning only if it occurs as the
      first character of a command.

^     "^string^replacement^" executes the last interactive command again
      after replacing the first occurrence of string by replacement. The
      third caret is optional unless the replacement string has trailing
      blanks. "^" has its special meaning only if it occurs as the first
      character of a command.
