└── Calculator program


/Calculator program:
--------------------------------------------------------------------------------
 1 | def add(x, y):
 2 |     return x + y
 3 | 
 4 | def subtract(x, y):
 5 |     return x - y
 6 | 
 7 | def multiply(x, y):
 8 |     return x * y
 9 | 
10 | def divide(x, y):
11 |     if y == 0:
12 |         return "Error! Division by zero."
13 |     else:
14 |         return x / y
15 | 
16 | print("Select operation:")
17 | print("1. Addition")
18 | print("2. Subtraction")
19 | print("3. Multiplication")
20 | print("4. Division")
21 | 
22 | while True:
23 |     choice = input("Enter choice (1/2/3/4): ")
24 | 
25 |     if choice in ('1', '2', '3', '4'):
26 |         num1 = float(input("Enter first number: "))
27 |         num2 = float(input("Enter second number: "))
28 | 
29 |         if choice == '1':
30 |             print("Result:", add(num1, num2))
31 |         elif choice == '2':
32 |             print("Result:", subtract(num1, num2))
33 |         elif choice == '3':
34 |             print("Result:", multiply(num1, num2))
35 |         elif choice == '4':
36 |             print("Result:", divide(num1, num2))
37 |     else:
38 |         print("Invalid input")
39 | 
40 |     again = input("Do you want to perform another calculation? (yes/no): ")
41 |     if again.lower() != "yes":
42 |         break
43 | 


--------------------------------------------------------------------------------