calc

from tkinter import *



root = Tk()

root.title("Simple Calculator")



e = Entry(root,width = 45,borderwidth = 10)

e.grid(row= 0, column= 0, columnspan=3,padx= 15, pady=15)



#e.insert(0,"")

def button_click(number):

   #e.delete(0, END)

   current = e.get()

   e.delete(0, END)

   e.insert(0, str(current) + str(number))

def button_clear():

   e.delete(0, END)



def button_add():

   first_num = e.get()

   global f_num

   global math

   math = "addition"

   f_num = int(first_num)

   e.delete(0, END)



def button_equal():

   second_num = e.get()

   e.delete(0, END)

   if math == "addition":

       e.insert(0, f_num + int(second_num))



   if math == "substraction":

       e.insert(0, f_num - int(second_num))



   if math == "multiplication":

       e.insert(0, f_num * int(second_num))



   if math == "division":

       e.insert(0, f_num / int(second_num))





def button_subtract():

   first_num = e.get()

   global f_num

   global math

   math = "substraction"

   f_num = int(first_num)

   e.delete(0, END)

   return



def button_multiply():

   first_num = e.get()

   global f_num

   global math

   math = "multiplication"

   f_num = int(first_num)

   e.delete(0, END)

   return



def button_divide():

   first_num = e.get()

   global f_num

   global math

   math = "division"

   f_num = int(first_num)

   e.delete(0, END)

   return



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_add = Button(root, text="+", padx=39, pady=20, command=button_add)

button_equal = Button(root, text="=", padx=91, pady=20, command=button_equal)

button_clear = Button(root, text="Clear", padx=79, pady=20, command=button_clear)



button_subtract = Button(root, text="-", padx=41, pady=20, command=button_subtract)

button_multiply = Button(root, text="*", padx=41, pady=20, command=button_multiply)

button_divide = Button(root, text="/", padx=40, pady=20, command=button_divide)



# Put the buttons on the screen

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_clear.grid(row=4,column=1,columnspan=2)

button_add.grid(row=5,column=0)

button_equal.grid(row=5,column=1,columnspan=2)

button_subtract.grid(row=6,column=0)

button_divide.grid(row=6,column=1)

button_multiply.grid(row=6,column=2)

root.mainloop()