| With no option, create local variable within function. |
| -L | Left justify and remove leading blanks. |
| -R | Right justify and remove trailing blanks. |
| -f | With no arguments, prints all function definitions. |
| -f fname | Prints the definition of function fname. |
| +f | Prints all function names. |
| -ft | Turns on trace mode for named function(s). |
| +ft | Turns off trace mode for named function(s). |
| -fu | Defines given name(s) as autoloaded function(s). |
| -i | Declare variable as an integer. |
| -l | Convert all letters to lowercase. |
| -r | Make variable read-only. |
| -u | Convert all letters to uppercase. |
| -x | Export variable, i.e., put in environment so
that it is passed to subshells. |
