Matches any single character. Quote the following character. Take text enclosed within quotes literally. Take text enclosed within quotes literally, after substituting any variables. Variables Variables in C shell are defined using the internal set command.
C shell supports both regular and array variables.
Simple integer calculations can be performed by C shell, using C language-type operators. The unset command can be used to unset any undesirable variables. Prevents overwriting of files when using redirection . If the history variable is set to a numerical value, that many commands typed previous would be remembered in a history list. Commands from the history are numbered from the first command being 1.