Different programming languages have different conventions for how to name variables.
It's called camel case because the uppercase letters in the middle of the variable names look like the humps on a camel.
Using Camel Case
These are examples of how to take a descriptive name and turn it into camel case:
|Original Descriptive Name||Camel Case Variable Name|
|Shopping Cart Item Count||
Functions and arguments follow this same rule. Always use camel case.
Look at the code in the editor. The variables should all be in camel case to keep things consistent. Fix the code by converting all values to camel case.
Remember that strings are not variable names, so you don't need to change the string arguments.