VBScript Tutorials - Herong's Tutorial Examples - v6.02, by Herong Yang
"For ... Next" Statement Example Examples
This section provides a tutorial example on how to use 'For ... Next' statements to repeat a block of statements.
To help you understand how "For ... Next" statements work, I wrote the following the example, loop_for.html:
<html> <body> <!-- loop_for.html - Copyright (c) 1998 HerongYang.com. All Rights Reserved. --> <pre> <script language="vbscript"> document.writeln("") For i = 3 To 30 Step 2 bIsPrime = True For j = 2 To i\2 bIsPrime = i Mod j > 0 If Not bIsPrime Then Exit For Next If bIsPrime Then document.writeln("Found a prime number: " & i) End If Next </script> </pre> </body> </html>
Here is the output:
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
The output looks good. Some notes about the sample script:
Table of Contents
Introduction of VBScript - Visual Basic Scripting Edition
Variant Data Type, Subtypes, and Literals
Numeric Comparison Operations and Logical Operations
String Operations - Concatenation and Comparison
Variable Declaration and Assignment Statement
Expression and Order of Operation Precedence
Statement Syntax and Statement Types
Array Data Type and Related Statements
Array References and Array Assignment Statements
Conditional Statements - "If ... Then" and "Select Case"
►Loop Statements - "For", "While", and "Do"
►"For ... Next" Statement Example Examples
"Function" and "Sub" Procedures
Inspecting Variables Received in Procedures
Error Handling Flag and the "Err" Object
Regular Expression Pattern Match and Replacement
scrrun.dll - Scripting Runtime DLL Library
IE Web Browser Supporting VBScript