Tk - Radio Button Widget

Radio button widget implements a multiple-choice button, which is a way to offer many possible selections to the user and lets user choose only one of them. The syntax for radio button widget is shown below −

radiobutton radiobuttonName options

Options

The options available for the radio button widget are listed below in the following table −

Sr.No.	Syntax & Description
1	-font fontDescriptor Used to set font for widget.
2	-height number Used to set height for widget.
3	-command action Sets the command action for button.
4	-text text Sets the text for the widget.
5	-width number Sets the width for widget.
6	-variable variableName Sets the variable for widget.
7	-value variableValue Sets the variable with variable value.

A simple radio button widget example is shown below −

#!/usr/bin/wish

grid [frame .gender ]
grid [label .myLabel  -text "Male" -textvariable myLabel1 ] 
grid [radiobutton .gender.maleBtn -text "Male"   -variable gender -value "Male"
   -command "set  myLabel1 Male"] -row 1 -column 2
grid [radiobutton .gender.femaleBtn -text "Female" -variable gender -value "Female"
   -command "set  myLabel1 Female"] -row 1 -column 3
.gender.maleBtn select

When we run the above program, we will get the following output −

tk_selection_widgets.htm