Calculator

Developed this in Python using Tkinter

Getting Started

1. Clone the repository on your local machine
2. Install Tkinter if you do not already have it
3. Run the .py file

from tkinter import *

root = Tk()
root.title("Calculator")

e = Entry(root, width=35, borderwidth=5)
e.grid(row=0, column=0, columnspan=4, padx=10, pady=10)

def button_click(number):
    current = e.get()
    e.delete(0, END)
    e.insert(0, str(current) + str(number))

def button_add():
    first_number = e.get()
    global num1
    global math
    math = "add"
    num1 = int(first_number)
    e.delete(0, END)

def button_subtract():
    first_number = e.get()
    global num1
    global math
    math = "subtract"
    num1 = int(first_number)
    e.delete(0, END)

def button_multiply():
    first_number = e.get()
    global num1
    global math
    math = "multiply"
    num1 = int(first_number)
    e.delete(0, END)

def button_divide():
    first_number = e.get()
    global num1
    global math
    math = "divide"
    num1 = int(first_number)
    e.delete(0, END)

def button_equal():
    second_number = e.get()
    e.delete(0, END)

    if math == "add":
        e.insert(0, num1 + int(second_number))
    elif math == "subtract":
        e.insert(0, num1 - int(second_number))
    elif math == "multiply":
        e.insert(0, num1 * int(second_number))
    elif math == "divide":
        e.insert(0, num1 / int(second_number))

def button_clear():
    e.delete(0, END)


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=40, pady=20, command=button_add)
button_subtract = Button(root, text="-", padx=40, pady=20, command=button_subtract)
button_multiply = Button(root, text="*", padx=40, pady=20, command=button_multiply)
button_divide = Button(root, text="/", padx=40, pady=20, command=button_divide)
button_equal = Button(root, text="=", padx=90, pady=20, command=button_equal)
button_clear = Button(root, text="AC", width = 35, padx=40, pady=10, command=button_clear)

#position buttons on screen

button_1.grid(row=4, column=0)
button_2.grid(row=4, column=1)
button_3.grid(row=4, column=2)

button_4.grid(row=3, column=0)
button_5.grid(row=3, column=1)
button_6.grid(row=3, column=2)

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

button_0.grid(row=5, column=0)
button_add.grid(row=2,column=3)
button_subtract.grid(row=3,column=3)
button_multiply.grid(row=4,column=3)
button_divide.grid(row=5,column=3)
button_equal.grid(row=5, column=1, columnspan=2)
button_clear.grid(row=1, column=0, columnspan=4)


root.mainloop()