Home Javascript JavaScript Statements
Questions:Ask|Latest

 
 

Share on Google+Share on Google+

JavaScript Statements

Advertisement
In this article you learn the basics of JavaScript and create your first JavaScript program.

JavaScript Statements

     

In this article you learn the basics of JavaScript and create your first JavaScript program.

JavaScript Statement
The JavaScript language supported Two type Condition.
 1.if statement
 2.Function

if Statement 
The if statement is used  to make decisions in JavaScript. Boolean operators are also used in along with the if statement. The if statement is  the most used features of JavaScript. It is basically the same in JavaScript as it is in other programming languages.

Example

<HTML>
<HEAD>
</HEAD>
<SCRIPT language="JavaScript">
<!-- 
var num = 10
if(num == 10)
{
document.write("<B>Statement!</B><BR>")
}
//--></SCRIPT>
my program successfully completed

</BODY>
</HTML>

Function 
The function keyword identifies as a function. The parameters in the parenthesis ( ) provide a means of passing values to the function. There can be as many parameters separated by commas as you need. This is perfectly ok to have a function with no parameters. These parameters are variables which are used by the JavaScript statements inside the curly braces { }. The variable keyword is not needed to declare the parameters in a function as variables because they are automatically declared and initialized when the function is called. The function can return a value by using the return keyword.

Example
  

<HTML>
<HEAD>
</HEAD>
<script languane="JavaScript">

function prod(a,b)
{
var x=a*b
return x;
}

var mul=prod(2,5);
document.write("multipication:"+mul);
</script>
</BODY>
</HTML>

Conditional JavaScript if-else Statement
The JavaScript Conditional Statement used to different  actions and used to  based on different conditions. you want to execute some code if a condition is true and another code the condition is not true, use the if....else statement.

Example

<HTML>
<HEAD>
</HEAD>
script type="text/javascript">
var a = new Date()
var time = a.getHours()
if (time < 20) 
{
document.write("Good morning!")
}
else
{
document.write("Good day!")
}
</script>
</BODY>
</HTML>

 

     

Advertisements

If you enjoyed this post then why not add us on Google+? Add us to your Circles



Liked it!  Share this Tutorial


Follow us on Twitter, or add us on Facebook or Google Plus to keep you updated with the recent trends of Java and other open source platforms.

Posted on: June 11, 2009

Related Tutorials

Ask Questions?    Discuss: JavaScript Statements   View All Comments

Post your Comment


Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image
 
 
Comments
vinu pradeep
May 31, 2012
javascript tutorial

It is a request that will you please include "try it yourself" after every example code
sara
July 23, 2012
java script and asp

wonderful website
Vinodh
July 31, 2012
Typo in conditional if-else example

The script tag doesn't have an opening angle bracket '<' (script type="text/javascript">)
joginder
October 19, 2012
javascript

your example of function is not fully correct.This is the correct program <html> <head> <title>function</title> </head> <body> <script language = "JavaScript"> function prod(a,b) { var x = a*b; return x; } var mul = prod(10,10); document.write("multiplication"+mul); </script> </body> </html>
joginder
October 19, 2012
javascript

I also correct the example of Conditional JavaScript if-else Statement <html> <head> </head> <body> <script type = "text/javascript"> var a = new Date() var time = a.getHours() if(time<20) { document.write("Good Morning"); } else { document.write("good day"); } </script> </body> </html>
DMCA.com