Default parameters: Calculate splitting a check between diners

Question

Can anyone help me writing the split_check() function?.

The problem statement is:

Write a split_check function that returns the amount that each diner
must pay to cover the cost of the meal. The function has 4 parameters:
bill: The amount of the bill. people: The number of diners to split
the bill between. tax_percentage: The extra tax percentage to add to
the bill. tip_percentage: The extra tip percentage to add to the bill.
The tax or tip percentages are optional and may not be given when
calling split_check. Use default parameter values of 0.15 (15%) for
tip_percentage, and 0.09 (9%) for tax_percentage

I need to calculate the amount of tip and tax, add to the bill total, then divide by the number of diners.

bill = float(input())
people = int(input())

#Cost per diner at the default tax and tip percentages
print('Cost per diner:', split_check(bill, people))

bill = float(input())
people = int(input())
new_tax_percentage = float(input())
new_tip_percentage = float(input())

# Cost per diner at different tax and tip percentages
print('Cost per diner:', split_check(bill, people, new_tax_percentage, new_tip_percentage))

Asked By: Abiyu T

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Source

Answer 1

You can see only bill and people are required, so you should add default values to your arguments:

def split_check(bill, people, tax = 0.09, tip = 0.15)

That means that if only two arguments are given, like in the first case, the tax and tip percentages will be 9% and 15% respectively. You should add to bill the amount bill*tax and bill*tip. In the end, you’ll divide the bill by the number of people and return it.

So we have this:

def split_check(bill, people, tax = 0.09, tip = 0.15):
    taxes = bill * tax
    tips  = bill * tip
    return (bill + taxes + tips) / people

You can also check if people is not smaller or equal to 0, if the arguments are numbers and not strings for example, and if tax and tip are between 0 and 1, etc. using a try/except block.

Answered By: Chris Rahmé

Answer 2

Taking all of the comments into account to understand the problem completely, here’s an answer that produces the right result:

def split_check(bill, people, tax = 0.15, tip = 0.09):
    tax = bill * tax 
    tip = bill * tip
    return (bill + tax + tip)/people
    
print('Cost per diner:', split_check(25, 2))

Or more concisely:

def split_check(bill, people, tax = 0.15, tip = 0.09):
    return bill * (1.0 + tax + tip) / people
    
print('Cost per diner:', split_check(25, 2))

Result:

Cost per diner: 15.5

Answered By: CryptoFool

Answer 3

Heres what I did:

I named the parameters with all default amounts
named new local variables to get new amounts
returned the per_person calculation

def split_check(bill=0, people=0, tax_percentage=0.09, tip_percentage=0.15):
    new_check = (bill * tax_percentage) + bill
    new_tip = bill * tip_percentage
    per_person = (new_check + new_tip) / people
    return per_person

bill = float(input())
people = int(input())

# Cost per diner at the default tax and tip percentages
print('Cost per diner:', split_check(bill, people))

bill = float(input())
people = int(input())
new_tax_percentage = float(input())
new_tip_percentage = float(input())

# Cost per diner at different tax and tip percentages
print('Cost per diner:', split_check(bill, people, new_tax_percentage, new_tip_percentage))

Answered By: Askarr

Answer 4

this works for me

def split_check(bill=0.0, people=0, tax_percentage=0.09, tip_percentage=0.15):
    bill_per_diner = ((bill + ((tax_percentage * bill) + (tip_percentage * bill))) / people)
    return bill_per_diner

Answered By: jo sh

Default parameters: Calculate splitting a check between diners

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