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calculator.py
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calculator.py
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from tkinter import *
root = Tk()
root.title("Simple Calculator")
e1 = Entry(root, width= 70)
e1.grid(row=0, column=0, columnspan=4, padx=10)
e = Entry(root, width=70, borderwidth=5)
e.grid(row=1, column=0, columnspan=4, padx=10, pady=10, ipady = 5)
def button_click(number):
#e.delete(0, END) simple insert will insert the number in reverse
current = e.get()
e.delete(0, END)
e.insert(0,str(current) + str(number))
e1.delete(0,END)
e1.insert(0, str(current) + str(number))
return
def button_addition():
global first_num
global sign
global pos
first_num = int(e.get())
sign = str(1)
k = str(e.get())
size = len(k)
e1.insert(size+1, '+')
pos = size+1
e.delete(0, END)
def button_subtraction():
global first_num
global sign
global pos
first_num = int(e.get())
sign = str(2)
k = str(e.get())
size = len(k)
e1.insert(size+1, '-')
pos = size+1
e.delete(0, END)
def button_multiplication():
global first_num
global sign
global pos
first_num = int(e.get())
sign = str(3)
k = str(e.get())
size = len(k)
e1.insert(size+1, '*')
pos = size+1
e.delete(0, END)
def button_division():
global first_num
global sign
global pos
first_num = int(e.get())
sign = str(4)
k = str(e.get())
size = len(k)
e1.insert(size+1, '/')
pos = size+1
e.delete(0, END)
def button_equalsto():
second_num = e.get()
e.delete(0, END)
e1.delete(0, END)
if sign == "1":
e.insert(0, int(first_num) + int(second_num))
e1.insert(0, int(first_num) + int(second_num))
elif sign == "2":
e.insert(0, int(first_num) - int(second_num))
e1.insert(0, int(first_num) - int(second_num))
elif sign == "3":
e.insert(0, int(first_num) * int(second_num))
e1.insert(0, int(first_num) * int(second_num))
elif sign == "4":
e.insert(0, int(first_num) / int(second_num))
e1.insert(0, int(first_num) / int(second_num))
def button_clear():
e.delete(0, END)
e1.delete(0, END)
button1 = Button(root, text="1", padx=40, pady=20, command=lambda: button_click(1))
button2 = Button(root, text="2", padx=40, pady=20, command=lambda: button_click(2))
button3 = Button(root, text="3", padx=40, pady=20, command=lambda: button_click(3))
button4 = Button(root, text="4", padx=40, pady=20, command=lambda: button_click(4))
button5 = Button(root, text="5", padx=40, pady=20, command=lambda: button_click(5))
button6 = Button(root, text="6", padx=40, pady=20, command=lambda: button_click(6))
button7 = Button(root, text="7", padx=40, pady=20, command=lambda: button_click(7))
button8 = Button(root, text="8", padx=40, pady=20, command=lambda: button_click(8))
button9 = Button(root, text="9", padx=40, pady=20, command=lambda: button_click(9))
button0 = Button(root, text="0", padx=40, pady=20, command=lambda: button_click(0))
button_mul = Button(root, text="*", padx=40, pady=20, command=button_multiplication)
button_div = Button(root, text="/", padx=40, pady=20, command=button_division)
button_add = Button(root, text="+", padx=40, pady=20, command=button_addition)
button_sub = Button(root, text="-", padx=40, pady=20, command=button_subtraction)
button_equals = Button(root, text="=", padx=40, pady=20, command=button_equalsto)
button_clear = Button(root, text="C", padx=40, pady=20, command= button_clear)
#Put the buttons on the screen
button1.grid(row=4, column=0)
button2.grid(row=4, column=1)
button3.grid(row=4, column=2)
button_mul.grid(row=4, column=3)
button4.grid(row=3, column=0)
button5.grid(row=3, column=1)
button6.grid(row=3, column=2)
button_div.grid(row=3, column = 3)
button7.grid(row=2, column=0)
button8.grid(row=2, column=1)
button9.grid(row=2, column=2)
button_clear.grid(row=2, column=3)
button0.grid(row=5, column=1)
button_add.grid(row=5, column=0)
button_sub.grid(row=5, column=2)
button_equals.grid(row=5, column=3)
root.mainloop()