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FUNCTIONS IN JAVASCRIPT
A block of code created specifically to carry out a specific task is referred to as a JavaScript
function. When a JavaScript function is called, it is executed.
CREATING AND CALLING A FUNCTION
Defining a function in JavaScript involves several key elements that determine the functionality of
the function and how it may be utilised.
The syntax of creating a function is as follows:
function name (parameter1, parameter2, parameter3,...,parameterN)
{
// code to be executed
}
To execute the function and pass an argument to the parameter, we invoke it by its name and
pass an argument (value).
The syntax of calling a function is as follows:
function name (argument1, argument2, ...); //invoking the function
For example,
function hello (name)
{
QR QUEST
document.write("Hello, " + name + "!");
Visit the given link
} to learn about JavaScript
hello("JavaScript"); function:
The output of the preceding program is as follows: https://www.youtube.com/watch?v=H-
FaxylC7bUc
Hello, JavaScript! Answer the given questions:
In this example, hello is the function name, name is a 1. What are some benefits of using
parameter, which is used inside the function to greet a person. functions in programming?
The function uses document.write() to output a message. 2. How is a function defined?
To execute the function and pass the argument value
“JavaScript”, we call the function as hello(“JavaScript”);.
Code
5 Create a web page to demonstrate the use of functions in JavaScript.
<!DOCTYPE HTML>
<HTML>
<HEAD>
111
JavaScript for Beginners
