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Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today. # Assigning Variables

The variable cost_per_person contains total and number_of_people, but then in the final example we have total_due instead ? Since the variable cost_per_person contains total divided by number_of_people does this still apply to the variable total_due instead ?? So I used 3 variables and a function named split_check The 3 variables are: total_amount which is the total bill number of people amount_per_person First of all the program will call the input function to enter the total_amount, then the number of people. After that the function split_check will be called. So it goes to the body of the split_check function where its defined with the keyword def. There it does the calculation and returns the value to the calling function amount_per_person=split_check(total_amount,number_of_people) which will be our result. And in the print function we output the result which is amount_per_person.

```import math

def split_check(total_amount, number_of_people):
return(math.ceil(total_amount/number_of_people))

total_amount=float(input("Enter the total bill:  "))
number_of_people=int(input("Enter the number of people:  "))

amount_per_person=split_check(total_amount,number_of_people)

print("Each person owes \${}".format(amount_per_person))
```

You can use your own variable names if that's easier for you to understand.

he used total_due so that the variable name(i.e the input value) wont clash with parameter's name (total) passed in the function i.e. def split_check(total,number_of_people) because variables should both have unique name as they are perform different tasks in the program ```# At the beginning of the video the split_check function looked like this.
# It had a variable named cost_per_person which stored the cost that each person
# had to pay, by dividing total (total cost) and number_of_people
# it then returned that value

def split_check(total, number_of_people):
cost_per_person = total / number_of_people
return cost_per_person

########################################
# Towards the end of the video, the Teacher made some changes to the code
# He removed the cost_per_person variable from the function split_check because
# we don't really need it, we can just return the final value of (total / number_of_people)
# without storing it in a variable

def split_check(total, number_of_people):
return math.ceil(total / number_of_people)

# for total_due, we ask the user to enter the total amount
# I'm not sure what do you mean by, "The variable cost_per_person contains total and number_of_people,
# but then in the final example we have total_due instead ?"
# total_due is a variable that holds whatever the user inputs, it then later gets passed in
# to the function split_check as an argument and total_due is divided by
# the number_of_people to get the final value

total_due = float(input("What is the total? "))
number_of_people = int(input("How many people? "))

amount_due = split_check(total_due, number_of_people)

print("Each person owes \${}".format(amount_due))

#  I think that you might be overthinking it or something but I'll leave you with this
# cost_per_person = total / number_of_people
# cost_per_person is the variable that holds the outcome of the 2 values, total and number_of_people
#
# total_due = float(input("What is the total? "))
# total_due is a variable that holds the float value input by the user,
# this float value will be then passed in to the function split_check which
# then will be divided by the number_of_people to get a final value

# Hopefully this helps somehow.
# If you need extra explanation just ask what's unclear to you and I'll try to help you.
```