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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. # calculate_price variable....

In the example we defined the function calculate_price(number_of_tickets). But in the cost calculation below we use cost = calculate_price(tickets). Shouldn't the variable in here be (number_of_tickets).

I got a little lost on how those end up being used properly though they are 2 different variables. If that makes sense. STAFF

When you define a function, the parameters it takes can be named anything you want. Then when you use them inside of the function, you need to use the same name. For instance:

```def multiply(num1, num2):
return num1 * num2
```

Here I made a function that multiplies two numbers together. The parameters are passed into the function and then multiplied together. Since I named them `num1` and `num2`, I will need to use those names inside the function in order to access the values being passed in.

Now when I call the function, the arguments being passed into the function will most likely be named something else because you may be passing in variables.

```tree = 5
bug = 3

multiply(tree, bug)
multiply(6, 7)
```

The arguments that I am passing into the function have names that are different than the function declaration because I am passing in variables. Here `tree` holds the number 5 and `bug` holds the number 3. You can also pass in values themselves into a function like my second function call shows.

Hopefully, this helps :)