Calculator Program in Python: A Step-By-Step Guide

# Basic Calculations
# Calculator Program in Python by using input() and format() functions

#Promting input from the user

n1 = float(input("Enter the First Number: "))
n2 = float(input("Enter the Second Number: "))

#addition

print("{} + {} = ".format(n1, n2))
print(n1 + n2)

#subtraction

print("{} - {} = ".format(n1, n2))
print(n1 - n2)

#multiplication

print("{} * {} = ".format(n1, n2))
print(n1 * n2)

#division

print("{} / {} = ".format(n1, n2))
print(n1 / n2)

#Calculator Program in python by defining operations

# Define Operators or Functions: Addition, Subtraction, Multiplication, and Division

# Addition

def addition(n1, n2):
    return n1 + n2

# Subtraction

def subtraction(n1, n2):
    return n1 - n2

# Multiplication

def multiplication(n1, n2):
    return n1 * n2

# Division

def division(n1, n2):
    return n1 / n2


print("Select Operations")
print(
    "1. Addition\n"\
    "2. Subtraction\n"\
    "3. Multiplication\n"\
    "4. Division\n")

# Giving the option to the user to choose the operation

operation = int(input("Enter choice of operation 1/2/3/4: "))


#Taking Input from the Users

n1 = float(input("Enter the First Number: "))
n2 = float(input("Enter the Second Number: "))


# Apply Conditional Statements: To make operation as-per-user choices

if operation == 1:
    print (n1, "+", n2, "=", addition(n1, n2))

elif operation == 2:
    print (n1, "-", n2, "=", subtraction(n1, n2)) 

elif operation == 3:
    print (n1, "*", n2, "=", multiplication(n1, n2)) 
    
elif operation == 4:
    print (n1, "/", n2, "=", division(n1, n2)) 
    
else:
    print("Invalid Input")

#importing tkinter library
import tkinter as tk
import tkinter.messagebox
from tkinter.constants import SUNKEN

window=tk.Tk()
window.title('My Calci')
frame=tk.Frame(master=window,bg="skyblue",padx=10)
frame.pack()
entry=tk.Entry(master=frame,relief=SUNKEN,borderwidth=3,width=30)
entry.grid(row=0,column=0,columnspan=4,ipady=2,pady=2)

#define myclick function to get the input from the user

def myclick(number):
    entry.insert(tk.END,number)

#define an equal function to evaluate the value
# try-except is use to handle the error

def equal():
    try:
        y=str(eval