"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:
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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
If bIsPrime Then
document.writeln("Found a prime number: " & i)
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:
- Nested loops, one loop inside another loop, are used.
- The outer loop goes through integers between 3 and 20, and skips even numbers with "Step 2"
- The inner loop goes determines if the current integer "i" is a prime or not
- The inner loop has a conditional "Exit For" statement to terminate the loop as soon as
"i" has been determined as a non-prime number.
Table of Contents
About This Book
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" Statements
►"For ... Next" Statement Example Examples
"While" Statement Examples
"Do ... Loop" Statements
"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
Creating Your Own Classes
IE Web Browser Supporting VBScript
IIS ASP Server Supporting VBScript
WSH (Windows Script Host)
PDF Printing Version