BCA PART A 7. Create a calculator program

 

def add(x, y):

    """Addition function"""

    return x + y

def subtract(x, y):

    """Subtraction function"""

    return x - y

def multiply(x, y):

    """Multiplication function"""

    return x * y

def divide(x, y):

    """Division function"""

    if y == 0:

        return "Error! Division by zero."

    else:

        return x / y

print("Select operation:")

print("1. Add")

print("2. Subtract")

print("3. Multiply")

print("4. Divide")

while True:

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

    if choice in ('1', '2', '3', '4'):

        num1 = float(input("Enter first number: "))

        num2 = float(input("Enter second number: "))

        if choice == '1':

            print("Result:", add(num1, num2))

        elif choice == '2':

            print("Result:", subtract(num1, num2))

        elif choice == '3':

            print("Result:", multiply(num1, num2))

        elif choice == '4':

            print("Result:", divide(num1, num2))

    else:

        print("Invalid input")

    next_calculation = input("Do you want to perform another calculation? (yes/no): ")

    if next_calculation.lower() != 'yes':

        break

Output :

Select operation:
1. Add
2. Subtract
3. Multiply
4. Divide
Enter choice (1/2/3/4): 1
Enter first number: 23
Enter second number: 67
Result: 90.0
Do you want to perform another calculation? (yes/no): yes

Enter choice (1/2/3/4): 

Output :

Select operation: 1. Add 2. Subtract 3. Multiply 4. Divide Enter choice (1/2/3/4): 5 Invalid input Do you want to perform another calculation? (yes/no): no