(Financial application: calculate tips)

Question

Write a program that reads the subtotal and the gratuity rate and computes the gratuity and total. For example, if the user enters 10 for the subtotal and 15% for the gratuity rate, the program displays 1.5 as the gratuity and 11.5 as the total. Here is another sample run:

Enter the subtotal: 15.69

Enter the gratuity rate: 15

The gratuity is 2.35 and the total is 18.04

Answer 1

Hi! This solution provides more checks in order to avoid errors.

def get_input(prompt, input_type):

# Keeps asking for an input until a valid input is received

while True:

user_input = input(prompt)

try:

return input_type(user_input)

except ValueError:

print(f"Please enter a valid {input_type.__name__}.")

def calculate_total_and_gratuity(subtotal, gratuity_rate):

gratuity = subtotal * (gratuity_rate / 100)

total = subtotal + gratuity

return gratuity, total

# Example of how to use the get_input function

subtotal = get_input("Enter the subtotal: ", float)

gratuity_rate = get_input("Enter the gratuity percentage: ",float)

gratuity, total = calculate_total_and_gratuity(subtotal, gratuity_rate)

print(f"The gratuity is {gratuity:.2f} and the total is {total:.2f}")

Answer 2

def calculate_tip(bill, perc):

return bill*perc

bill = input("Enter the bill total: ")

perc = input("Enter the percent gratuity: ")

tip = calculate_tip(float(bill), float(perc/100))

total = float(bill) + tip

print(tip)

print(total)

Hi,

Please see the above code.

(1) we define a function that returns the tip by calculating it as a percentage of the original bill

(2) the total we add the bill due to the tip

Hope this is clear!