What is argument passing in JavaScript?

What is argument passing in JavaScript?

Argument passing in JavaScript refers to how values are passed to functions when they are called. There are two main types: pass by value and pass by reference.

Can you explain the difference between pass by value and pass by reference?

Sure! Pass by value means that a copy of the variable's value is passed to the function, while pass by reference means that a reference to the actual variable is passed, allowing the function to modify the original variable.

Which data types are passed by value and which are passed by reference?

In JavaScript, primitive data types (like numbers, strings, and booleans) are passed by value, while objects and arrays are passed by reference.

Can you give an example of each?

Absolutely! For pass by value, if you pass a number to a function and change it inside, the original number remains unchanged. For pass by reference, if you pass an object and modify a property, the original object will reflect that change.