Calculator_python

import tkinter as tk

# Function to evaluate the expression and update the display
def evaluate():
    try:
        result = str(eval(entry.get()))
        result_label.config(text="Result: " + result)
    except Exception as e:
        result_label.config(text="Invalid input")

# Create the main window
window = tk.Tk()
window.title("Simple Calculator")

# Create an Entry widget for user input
entry = tk.Entry(window, width=30)
entry.grid(row=0, column=0, columnspan=4)

# Create buttons for numbers and operators
buttons = [
    '7', '8', '9', '/',
    '4', '5', '6', '*',
    '1', '2', '3', '-',
    '0', '.', '=', '+'
]

row, col = 1, 0
for button in buttons:
    tk.Button(window, text=button, padx=20, pady=20, command=lambda b=button: entry.insert(tk.END, b) if b != '=' else evaluate()).grid(row=row, column=col)
    col += 1
    if col > 3:
        col = 0
        row += 1

# Create a label to display the result
result_label = tk.Label(window, text="Result: ")
result_label.grid(row=5, column=0, columnspan=4)

# Run the GUI
window.mainloop()