13.32.18 Tcl Command Documentation Conventions

command - argument

Commands and arguments appear in Courier New typeface.

variable

Variables appear in blue, italic Courier New typeface. You must substitute an appropriate value for the variable.

[-argumentvalue] [variable]+

Optional arguments begin and end with a square bracket with one exception: if the square bracket is followed by a plus sign (+), then users must specify at least one argument. The plus sign (+) indicates that items within the square brackets can be repeated. Do not enter the plus sign character.