CALCULATOR

#MAKING CALCULATOR USING TKINTER


from tkinter import *
root=Tk()
root.title("Simple Calculator")
e=Entry(root,width=35,borderwidth=5)
e.grid(row=0,column=0,columnspan=3,padx=10 ,pady=10)

def button_click(number):
    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_number =e.get()
    global f_num
    global math
    math="addition"
    f_num=int(first_number)
    e.delete(0,END)

def button_subtract():
    first_number = e.get()
    global f_num
    global math
    math = "subtraction"
    f_num = int(first_number)
    e.delete(0, END)

def button_multiply():
    first_number = e.get()
    global f_num
    global math
    math = "multiplication"
    f_num = int(first_number)
    e.delete(0, END)


def button_divide():
    first_number = e.get()
    global f_num
    global math
    math = "division"
    f_num = int(first_number)
    e.delete(0, END)



def button_equal():
    second_number=e.get()
    e.delete(0,END)
    if math=="addition":
         e.insert(0,f_num+int(second_number))
    elif math=="subtraction":
        e.insert(0, f_num - int(second_number))
    elif math=="multiplication":
        e.insert(0, f_num * int(second_number))
    elif math=="division":
        e.insert(0, f_num / int(second_number))




button_1=Button(root,text="1",command=lambda:button_click(1),padx=40,pady=20)
button_2=Button(root,text="2",command=lambda:button_click(2),padx=40,pady=20)
button_3=Button(root,text="3",command=lambda:button_click(3),padx=40,pady=20)
button_4=Button(root,text="4",command=lambda:button_click(4),padx=40,pady=20)
button_5=Button(root,text="5",command=lambda:button_click(5),padx=40,pady=20)
button_6=Button(root,text="6",command=lambda:button_click(6),padx=40,pady=20)
button_7=Button(root,text="7",command=lambda:button_click(7),padx=40,pady=20)
button_8=Button(root,text="8",command=lambda:button_click(8),padx=40,pady=20)
button_9=Button(root,text="9",command=lambda:button_click(9),padx=40,pady=20)
button_0=Button(root,text="0",command=lambda:button_click(0),padx=40,pady=20)

button_add=Button(root,text="+",command=button_add,padx=39,pady=20)
button_clear=Button(root,text="Clear",command=button_clear,padx=79,pady=20)
button_equal=Button(root,text="=",command=button_equal,padx=88,pady=20)

button_subtract=Button(root,text="-",command=button_subtract,padx=40,pady=20)
button_multiply=Button(root,text="*",command=button_multiply,padx=40,pady=20)
button_divide=Button(root,text="/",command=button_divide,padx=40,pady=20)

button_7.grid(row=1,column=0)
button_8.grid(row=1,column=1)
button_9.grid(row=1,column=2)

button_6.grid(row=2,column=0)
button_5.grid(row=2,column=1)
button_4.grid(row=2,column=2)

button_3.grid(row=3,column=0)
button_2.grid(row=3,column=1)
button_1.grid(row=3,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_multiply.grid(row=6, column=1)
button_divide.grid(row=6, column=2)

root.mainloop()