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# I figured out the answer but I dont know why my previous answer was wrong and the latest one is correct. Guidance?

The below is my code. I get the error cost_per_person

```def split_check(invoice, no_of_people):
cost_per_person = invoice / no_of_people
return cost_per_person

invoice = int(input("Whats the bill total? "))
no_of_people = int(input("How many people were at dinner? "))
split_check(invoice, no_of_people)
print("Each one owes ", cost_per_person)
```

```def split_check(invoice, no_of_people):
cost_per_person = invoice / no_of_people
return cost_per_person

bill = int(input("Whats the bill total? "))
people = int(input("How many people were at dinner? "))
per_person = split_check(bill, people)
print("Each one owes ", per_person)
```

The analogy works as below: When you call a function, you will pass arguments once you pass arguments you can process stuff passed within the function parameters and then return something whatever is processed.

Once you return anything using function it will return anything to the Caller means if variable is calling a function then return value is assigned to the variable and if you simply call it using nothing then function will return value to the console but don't do anything.

So coming to your code you returned value and tried to access the variable inside the function which you can't as the scope of the variable is limited to the function only and because of which it showed you error.

Hope this helps.

```split_check(invoice, no_of_people)
```

This line is calling on split_check function which the function have a return value. You need to assign the return value into a variable or use it in another function

```cost_per_person=split_check(invoice, no_of_people)
```

or

```print("Each one owes ", split_check(invoice, no_of_people))
```