Pass by Value in JavaScript

In JavaScript, the concept of “pass by value” explains how arguments are passed to functions. When primitive data types (like numbers, strings, and booleans) are passed as function arguments, the actual value is copied into the parameter inside the function. Changes made to the parameter inside the function do not affect the original value outside the function, demonstrating the pass-by-value behavior. When objects (including arrays and functions) are passed as arguments, their reference is passed by value. When the reference is copied, changes made to the object’s properties or elements within the function affect the original object outside the function, giving the appearance of pass-by-reference behavior in certain cases. Understanding these concepts helps in code maintainability and helps in debugging the code easily.