Parameters and Arguments in JavaScript

In JavaScript, functions frequently involve two concepts: parameters and arguments. Although they are closely related, they possess distinct meanings. A parameter refers to a variable established within the function's parentheses when a function is created. It functions as a placeholder to hold the value that the function receives. For example, in the function greet(name), name is a parameter. However, at this stage, no specific value has been assigned to name, indicating that it is merely awaiting a value.

Conversely, an argument represents the actual value that is communicated to a function when it is invoked. In the case of greet("Abishek"), "Abishek" serves as the argument. The argument "Abishek" is subsequently passed to the parameter name. When the function executes as follows: function greet(name) { console.log("Hello" + name); } greet("Abishek"); In this execution, the value "Abishek" is allocated to the parameter name. Consequently, the output becomes: Hello Abishek

The primary distinction between a parameter and an argument lies in their roles. Parameters are defined during the function definition, whereas arguments are supplied during the function call. Parameters act as placeholders that ultimately receive the values of arguments. For instance, in the function add(a, b), both a and b are parameters, while 10 and 20 are arguments in the function call add(10, 20);

In summary, parameters play the role of placeholders within the function's definition, while arguments are the actual values transmitted during the function call. Understanding the difference between these two concepts is crucial when working with JavaScript functions.