Special characters

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.

1. 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.