Simple Calculator using Tkinter

Tkinter serves as a Python library for crafting user interfaces. Here is code for creating a simple calculator in python using Tkinter.

If you are newbee to python, you can check my Python Tutorials. If you want to know more about Tkinter Library, you can refer my Tkinter tutorial.

import tkinter as tk

def button_click(value):
    current = entry.get()
    entry.delete(0, tk.END)
    entry.insert(tk.END, current + str(value))

def clear_entry():
    entry.delete(0, tk.END)

def backspace():
    current = entry.get()
    entry.delete(0, tk.END)
    entry.insert(tk.END, current[:-1])

def evaluate():
    try:
        expression = entry.get()
        result = eval(expression)
        entry.delete(0, tk.END)
        entry.insert(tk.END, str(result))
    except Exception as e:
        entry.delete(0, tk.END)
        entry.insert(tk.END, "Error")

root = tk.Tk()
root.title("Colorful Calculator")
root.geometry("400x500")
root.config(bg="#282c35")  

entry = tk.Entry(root, width=20, font=('Arial', 20), justify=tk.RIGHT, bd=10)
entry.grid(row=0, column=0, columnspan=4, padx=10, pady=10, ipady=20)  

# Buttons
buttons = [
    '7', '8', '9', '/',
    '4', '5', '6', '*',
    '1', '2', '3', '-',
    '0', '.', '=', '+'
]

row_val = 1
col_val = 0

for button in buttons:
    tk.Button(
        root, text=button, padx=20, pady=20, font=('Arial', 16),
        command=lambda b=button: button_click(b) if b != '=' else evaluate(),
        bg="#61dafb", 
        fg="#282c35"   
    ).grid(row=row_val, column=col_val, sticky="nsew")  
    col_val += 1
    if col_val > 3:
        col_val = 0
        row_val += 1

tk.Button(
    root, text='C', padx=20, pady=20, font=('Arial', 16),
    command=clear_entry, bg="#ff6b6b", fg="#282c35"
).grid(row=row_val, column=col_val, sticky="nsew")
col_val += 1
tk.Button(
    root, text='⌫', padx=20, pady=20, font=('Arial', 16),
    command=backspace, bg="#ff6b6b", fg="#282c35"
).grid(row=row_val, column=col_val, sticky="nsew")

for i in range(1, 5):
    root.grid_rowconfigure(i, weight=1)
    root.grid_columnconfigure(i, weight=1)

# Main loop
root.mainloop()

You can Check my previous post here:

• Tkinter Tutorial
• Python Tutorials
• Virtual Environments
• Numpy Tutorials
• Statistics
• Python String Exercises
• Python List Exercises

Happy coding!!!!!!!!!!!