```python
import tkinter as tk
from tkinter import *

window = tk.Tk()

window.title("1Cademy")
window.geometry("350x100")

var = IntVar()

def check_info():
	if var.get() == 1:
		tk.Label(text="Thank you").pack()
	else:
		tk.Label(text="Its not checked").pack()

c = tk.Checkbutton(text="Check this box", variable=var).pack()

btn = tk.Button(text="Submit", command=check_info).pack()

window.mainloop()
```


Georgia State University

To use the checkbox we use the ```Checkbutton()``` class.

If we want to store the state of the checkbox (checked or unchecked), we can assign the state to a variable. 

Syntax:
```python
isChecked = IntVar()
check1 = Checkbutton(text='some text', variable='isChecked')
check1.pack()
```
By default, the state is 0 (unchecked) and 1 (checked). But we can change it using the ```onvalue``` and ```offvalue``` parameter:

```python
check1 = Checkbutton(text='some text', variable='isChecked', onvalue="Selected", offvalue="NotSelected")
```


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