from tkinter import *
root = Tk()
root.title("simple calculator")
e = Entry(root, width=50, borderwidth=10)
e.grid(row=0, column=0, columnspan=4)
f_number = None
operator = None
def add():
global f_number
global operator
operator = '+'
f_number = int(e.get())
e.delete(0, END)
def Division():
global f_number
global operator
operator = '/'
f_number = int(e.get())
e.delete(0, END)
def minus():
global f_number
global operator
operator = '-'
f_number = int(e.get())
e.delete(0, END)
def Multiplication():
global f_number
global operator
operator = '*'
f_number = int(e.get())
e.delete(0, END)
def Remainder():
global f_number
global operator
operator = '%'
f_number = int(e.get())
e.delete(0, END)
def power():
global f_number
global operator
operator = '**'
f_number = int(e.get())
e.delete(0, END)
def button_click(num: int):
c = e.get()
e.delete(0, END)
e.insert(0, str(c) + str(num))
def button_clear():
e.delete(0, END)
def button_equal():
second_number = e.get()
e.delete(0, END)
if operator == '+': # conditions
e.insert(0, f_number + int(second_number))
elif operator == '-':
e.insert(0, f_number - int(second_number))
elif operator == '*':
e.insert(0, f_number * int(second_number))
elif operator == '**':
e.insert(0, f_number ** int(second_number))
elif operator == '/':
e.insert(0, f_number / int(second_number))
elif operator == '%':
e.insert(0, f_number % int(second_number))
button_1 = Button(root, text='1', padx=40, pady=20,
command=lambda: button_click(1))
button_2 = Button(root, text='2', padx=40, pady=20,
command=lambda: button_click(2))
button_3 = Button(root, text='3', padx=40, pady=20,
command=lambda: button_click(3))
button_4 = Button(root, text='4', padx=40, pady=20,
command=lambda: button_click(4))
button_5 = Button(root, text='5', padx=40, pady=20,
command=lambda: button_click(5))
button_6 = Button(root, text='6', padx=40, pady=20,
command=lambda: button_click(6))
button_7 = Button(root, text='7', padx=40, pady=20,
command=lambda: button_click(7))
button_8 = Button(root, text='8', padx=40, pady=20,
command=lambda: button_click(8))
button_9 = Button(root, text='9', padx=40, pady=20,
command=lambda: button_click(9))
button_0 = Button(root, text='0', padx=40, pady=20,
command=lambda: button_click(0))
button_clear1 = Button(root, text='clear', padx=30,
pady=20, command=button_clear)
button_equal1 = Button(root, text='=', padx=39,
pady=20, command=button_equal)
button_add1 = Button(root, text='+', padx=38,
pady=20, command=add)
button_Division = Button(root, text='/', padx=40,
pady=20, command=Division)
button_minus = Button(root, text='-', padx=39,
pady=20, command=minus)
button_Multiplication = Button(root, text='*',
padx=40, pady=20, command=Multiplication)
button_Remainder = Button(root, text='%', padx=38,
pady=20, command=Remainder)
button_power = Button(root, text='**', padx=38,
pady=20, command=power)
button_1.grid(row=3, column=0)
button_2.grid(row=3, column=1)
button_3.grid(row=3, column=2)
button_4.grid(row=2, column=0)
button_5.grid(row=2, column=1)
button_6.grid(row=2, column=2)
button_7.grid(row=1, column=0)
button_8.grid(row=1, column=1)
button_9.grid(row=1, column=2)
button_0.grid(row=4, column=0)
button_clear1.grid(row=4, column=1)
button_equal1.grid(row=4, column=2)
button_add1.grid(row=5, column=0)
button_Division.grid(row=5, column=1)
button_Multiplication.grid(row=5, column=2)
button_minus.grid(row=6, column=0)
button_Remainder.grid(row=6, column=1)
button_power.grid(row=6, column=2)
root.mainloop()