<Li> $is prefixed to names to define variables in the PHP language and the AutoIt automation script language, scalar variables in the Perl language (see sigil (computer programming)), and global variables in the Ruby language . In Perl programming this includes scalar elements of arrays $array (7) and hashes $hash (foo). </Li> <Li> In most shell scripting languages, $is used for interpolating (substitution of) environment variables, special variables, arithmetic computations and special characters, and for performing translation of localised strings . Christopher Stratchey's GPM, the inspiration for the Multics shell, used the non-ASCII symbol § for macro expansion . </Li> <Li> $is used in the ALGOL 68 language to delimit transput format regions . </Li> <Li> $is used in the TeX typesetting language to delimit mathematical regions . </Li>

When did the dollar sign change to one line