Home > Developer > JavaScript

JavaScript Conditional Statement If ... Else

Source: Internet
Author: User
Tags date
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

Core tips: JavaScript Conditional Statement If ... Else

When you write code, you often need to perform different behaviors according to different conditions. You can use conditional statements in your code to accomplish this task.

In JavaScript, we can use the following conditional statements:

If statement
Executes code when a specified condition is set up.
If...else statement
Executes code when the specified condition is set up, and executes additional code when the condition is not valid.
If...else If....else Statement
Use this statement to choose to execute one of several block of code.
Switch statement
Use this statement to choose to execute one of several block of code.

If statement

<ptml> <body> <p> This example demonstrates an IF statement. </p> <p> If the browser time is less than 10, then ask you "Good Morning". </p> </body> </ptml>

This example shows an If statement.

If the browser time is less than 10, then ask you "Good Morning".


If...else statement

<ptml><br/><body><br/><br/><script type= "Text/javascript" ><br/>var d = New Date () <br/>var time = D.gethours () <br/><br/>if (Time <) <br/>{<br/> document.write ("<b> Good Morning </b>") <br/>}<br/>else<br/>{<br/>document.write ("<b > Wish you a Happy </b> ") <br/>}<br/></script><br/><br/><p> This example demonstrates If ... Else statement. </p><br/><br/><p> If the browser time is less than 10, then will ask you "Good morning", otherwise will greet you "wish you Happy". </p><br/><br/></body><br/></ptml><br/><br/>

This example shows If ... Else statement.

If the browser time is less than 10, then will ask you "Good morning", otherwise will say hello to you "wish you Happy".


If.. else If...else statement

<ptml><br/><body><br/><br/><script type= "Text/javascript" ><br/>var d = New Date () <br/>var time = D.gethours () <br/>if (time<10) <br/>{<br/>document.write ("<b >good morning</b> ") <br/>}<br/>else if (time>=10 && time<16) <br/>{<br/ >document.write ("<b>good day</b>") <br/>}<br/>else<br/>{<br/> document.write ("<b>hello world!</b>") <br/>}<br/></script><br/><br/> <p> This example demonstrates if. else If...else statement. </p><br/><br/></body><br/></ptml>

Good Day
This example shows if. else If...else statement.



This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Keywords:
if else statement javascript multiple conditions conditional if statement if else if statement if else if else statement javascript conditional statement shorthand explain if else statement html if else statement

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

What's Trending
Top 10 Tags
datastax versions naming convention zookeeper client class definition md5 microsoft sql server 2005 data structures exception handling error handling
Top 10 Keywords
microsoft download center down wordpress address url site address url wordpress address url windows installer 4 0 download 302 not found web address url definition site address url wordpress db2 integer mac os installation step by step pdf abbreviation for return

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

  • Sales Support

    1 on 1 presale consultation

    Chat Contact Sales

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    Open a Ticket

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

    Learn More