Scientific calculator using Tkinter

Here is the code for developing scientific calculator in Tkinter. Tkinter is a User Interface Library for python. 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.

Here You will get more projects in Tkinter.

Giving the full code for scientific calculator.

import tkinter as tk
import math

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")

def apply_sqrt():
    current = entry.get()
    entry.delete(0, tk.END)
    entry.insert(tk.END, str(math.sqrt(float(current))))

def apply_sin():
    current = entry.get()
    entry.delete(0, tk.END)
    entry.insert(tk.END, str(math.sin(math.radians(float(current)))))

def apply_cos():
    current = entry.get()
    entry.delete(0, tk.END)
    entry.insert(tk.END, str(math.cos(math.radians(float(current)))))

def apply_tan():
    current = entry.get()
    entry.delete(0, tk.END)
    entry.insert(tk.END, str(math.tan(math.radians(float(current)))))

# Main window
root = tk.Tk()
root.title("Scientific Calculator")
root.geometry("400x600")
root.config(bg="#2c3e50")  

entry = tk.Entry(root, width=20, font=('Arial', 20), justify=tk.RIGHT, bd=10)
entry.grid(row=0, column=0, columnspan=6, padx=10, pady=10, ipady=20)  
button_params = {'font': ('Arial', 14), 'padx': 20, 'pady': 20, 'bg': "#3498db", 'fg': "#ecf0f1"}

buttons = [
    '7', '8', '9', '/',
    '4', '5', '6', '*',
    '1', '2', '3', '-',
    '0', '.', '=', '+',
    '(', ')', 'C', '⌫',
    'sin', 'cos', 'tan', 'sqrt'
]

row_val = 1
col_val = 0

for button in buttons:
    tk.Button(
        root, text=button,
        command=lambda b=button: button_click(b) if b not in {'=', 'sin', 'cos', 'tan', 'sqrt', 'C', '⌫'} else evaluate() if b == '=' else apply_sqrt() if b == 'sqrt' else apply_sin() if b == 'sin' else apply_cos() if b == 'cos' else apply_tan() if b == 'tan' else clear_entry() if b == 'C' else backspace(),
        **button_params
    ).grid(row=row_val, column=col_val, sticky="nsew") 
    col_val += 1 
    if col_val > 3:
        col_val = 0
        row_val += 1

for i in range(1, 6):
    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!!!!