|[ < ]||[ > ]||[ << ]||[ Up ]||[ >> ]||[Top]||[Contents]||[Index]||[ ? ]|
The name of a variable must be a sequence of letters, digits,
underscores and dashes, but it may not begin with a digit or dash. Notice,
that in contrast to the majority of programming languages, use of
dashes (minus signs) is allowed in user names. This is because
traditionally RADIUS attribute names contain dashes, so
extending this practice to variable names makes
programs more consistent. On the other hand, this means that you
should be careful when using minus sign as a subtraction
operator (see minus-ambiguity). Case is significant in variable names:
A are different variables.
A name of a variable may coincide with one of
keywords. See section Reserved Keywords, for description on how to use such
A few variables have special built-in meanings (see section Built-in Variables). Such variables can be assigned and accessed just as any other ones. All built-in variables names are entirely upper-case.
Variables are never declared, they spring into existence when an assignment is made to them. The type of a variable is determined by the type of the value assigned to it.
This document was generated by Sergey Poznyakoff on December, 6 2008 using texi2html 1.78.