What are some common mistakes in argument passing?

What are some common mistakes in argument passing?

Common mistakes include passing by value instead of reference, forgetting to check for null values, and not using default arguments.

Can you explain what passing by value means?

Passing by value means that a copy of the variable is passed to the function, so changes made inside the function do not affect the original variable.

What about passing by reference?

Passing by reference means that a reference to the original variable is passed, allowing the function to modify the original variable directly.

How can I avoid these mistakes?

To avoid these mistakes, always be clear about whether you want to pass by value or reference, and validate your inputs before processing.