Tkinter Spinbox is used to add the increment and decrement buttons to the Entry widget, making it useful to handle the numerical data of any application. A spinbox widget can be created using the Spinbox(arguments). We can set the default value for the spinbox widget by defining the Value using StringVar() object. The default value plays a vital role for any widget, as it helps you to define the bounded value.
Example
#Import Tkinter library
from tkinter import *
from tkinter import ttk
#Create an instance of Tkinter frame or window
win= Tk()
#Set the geometry of tkinter frame
win.geometry("750x250")
#Set the default value for SpinBox
my_var= StringVar(win)
my_var.set("1.0")
#Create a spinbox
spinbox= ttk.Spinbox(win, from_=0.5, to=10.0, increment=0.01, textvariable=my_var)
spinbox.pack(ipadx=20, pady=20)
win.mainloop()Output
Executing the above code will display a window that contains a spinbox having a default value set to 1.0.
