JavaScript Tutorials - Herong's Tutorial Examples - 2.33, by Herong Yang
"for" Loop Statement Example
This section provides a JavaScript tutorial example showing how to write a 'for' loop statement.
To help you understand how "for" loop statements work, I wrote the following the JavaScript tutorial example, For_Loop_Statements.html:
<html> <!-- For_Loop_Statements.html Copyright (c) 2002 HerongYang.com. All Rights Reserved. --> <head><title>For Loop Statements</title></head> <body> <pre> <script type="text/javascript"> var i, j, is_prime; for ( i=3; i<=30; i+=2 ) { is_prime = true; for ( j=2; j<=i/2; j++) { is_prime = i%j > 0; if (!is_prime) break; } if (is_prime) document.write("Found a prime number: " + i + ".\n"); } </script> </pre> </body> </html>
Note that:
The output of this sample JavaScript is:
Found a prime number: 3. Found a prime number: 5. Found a prime number: 7. Found a prime number: 11. Found a prime number: 13. Found a prime number: 17. Found a prime number: 19. Found a prime number: 23. Found a prime number: 29.
Table of Contents
ECMAScript Language Specification and JavaScript Dialects
Data Types, Variables and Expressions
Conditional "if" Statement Examples
"switch ... case" Statement Example
"while" Loop Statement Example
Creating, Accessing, and Manipulating Arrays
Defining and Calling Functions
Web Browser Supporting JavaScript
Server-Side and Client-Side Web Scripting
Defining Your Own Object Types
Inheritance of Properties and Methods through the Prototype Object Chain
'jrunscript' - JavaScript Shell Command from JDK
Using Functions as "Function" Objects
Introduction to Built-in Object Types
W3C's Document Object Model (DOM) Specifications