Format Command in Tcl/Tk (Number Conversion)

Format command present the user's input into a specific format. Default number in Tcl is decimal. %b - Binary format %o - Octal format %x - Hexadecimal format #widget used to create #GUI is #checkbutton, which has inbuit command with mouse left click. #Entry widget used to accepts input and display the result. Event are driven by #mouse button-1