The widget roundup provides you with a quick and easy reference to the most important features and options for each Tk widget.

Label

Widget Essentials

When to use: To show a static text or image to the user, whether identifying some other user interface element (e.g. "Name" next to an entry), something purely decorative, or presenting a result. Users normally do not interact with labels.
Tcl:ttk::label .lbl -text "Name:"
Ruby:lbl = Tk::Tile::Label.new(parent) {text "Name:"}
Perl:my $lbl = parent->new_ttk__label(-text => "Name:");
Python:lbl = ttk.Label(parent, text="Name:")
Reference:(at www.tcl.tk)

Common Options

text The text string to be shown in the label.
textvariable As an alternative to text, get the string from a variable, updating when the variable changes.
image,
compound
Specify a Tk Image object (not the path to an image file) instead of the text string. If compound is center, top, bottom, left, or right, display the text and the image.
justify Alignment of text: left, center or right.
wraplength For multi-line labels; let Tk calculate the line breaks rather than explicitly embedding newlines in the text string.