Passing by value and by reference - Course JavaScript - Part 16 | web Developer courses

Duration:  15 minutes

Summary: In this video we discuss functions and how we can pass parameters to them. As we stated in previous videos functions are chunks of code that you can name and refer to any time you need them. We start by talking about the syntax of creating functions, and how we can call them inside the page. We also see how to put functions in other files and add the reference in the page. But the main discussion is how to pass parameters to the functions. Parameters are passed by value and by reference. By value means that only a copy of the parameter will be passed inside the function. And any changes made to that parameter will not be realized when the function completes because we are changing the copy not the original parameter. An example of these parameters will be string and int. The other type is passing be reference and any changes made to the parameter in this case will be permanent since we are changing the original value not the copy. All JavaScript objects are passed by reference.

Methodology of the development of example: Good coding standard and simplified design.

Technology Used: JavaScript – Core language Concepts

Keywords: JavaScript, HTML, function, var, script, document, writeln.