What are common mistakes in setting up a function?

What are some common mistakes people make when setting up a function?

Some common mistakes include not defining parameters correctly, forgetting to return a value, and using global variables.

Can you explain why forgetting to return a value is a mistake?

Forgetting to return a value can lead to unexpected results, as the function will return 'undefined' by default.

What about using global variables? Why is that a problem?

Using global variables can cause conflicts and make your code harder to debug, as they can be modified from anywhere.

How can I avoid these mistakes in my code?

You can avoid these mistakes by thoroughly testing your functions, using local variables, and following best practices in coding.