Visual Basic Fundamentals for Absolute Beginners: (08) Operators, Expressions and…
Visual Basic Fundamentals for Absolute Beginners: (09) For..Next Iterations
Play Visual Basic Fundamentals for Absolute Beginners: (09) For..Next Iterations
Description
Iterations allow our applications to loop through a block of code until a condition is satisfied. We'll cover several different types of iteration statements throughout this series, but we'll start with the for iteration statement. I'll demonstrate how to utilize "code snippets" to help remind you of the syntax for this complex statement, and will demonstrate debugging in action as we watch the values of our loops displayed in the Visual Studio IDE in several ways.
Full course outline:
- Mod 01: Series Introduction
- Mod 02: Installing Visual Studio Express 2013 for Windows Desktop
- Mod 03: Creating Your First Visual Basic Program
- Mod 04: Dissecting the First Visual Basic Program You Created
- Mod 05: Quick Overview of the Visual Basic Express Edition IDE
- Mod 06: Declaring Variables and Assigning Values
- Mod 07: Branching with the If..Then..Else Decision Statement
- Mod 08: Operators, Expressions and Statements
- Mod 09: For..Next Iterations
- Mod 10: Creating Arrays of Values
- Mod 11: Creating and Calling Simple Overloaded Helper Methods
- Mod 12: While Iterations and Reading Data from a Text File
- Mod 13: Working with Strings
- Mod 14: Working with Dates
- Mod 15: Understanding and Creating Classes
- Mod 16: More about Classes and Methods
- Mod 17: Working with Classes and Inheritances in the .NET Framework Class Library
- Mod 18: Understanding Namespaces and Adding References to Assemblies
- Mod 19: Understanding Modules, Scope and Utilizing Accessibility Modifiers
- Mod 20: Enumerations and the switch Decision Statement
- Mod 21: Gracefully Handling Exceptions
- Mod 22: Working with Collections
- Mod 23: Filtering and Managing Data in Collections using LINQ
- Mod 24: Understanding Event Driven Programming
- Mod 25: Getting Familiar with the My Namespace
- Mod 26: Where To Go From Here
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The Discussion
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Shadolio What's the difference between the use of the For..Next and Loop..Until statements?
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Duncanma @Shadolio: For Next is traditionally used when you want to go through a loop a specific number of times. You could accomplish the same thing in a Loop, but you'd have to declare the index variable and you'd have to increment it yourself. It does allow you some more flexibility (you could increment by 2 if a certain condition was met for example), but it also opens the door to an infinite loop if you forget to increment the counter or write your logic incorrectly. If you have a fixed number of loop iterations in mind, I'd use a For ... Next, if you want to loop until you find something or for a variable amount of time, then a Do Until ... Loop may be a better choice. Just make sure you always have a way out (if you hit the end of the file, or have been looping more than x times without hitting your expected condition, etc.)
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KRISTIYAN NIKOLOV hello seems this note with tab tab is enable by configuration i dont have it
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Natalia Hi! I was just wondering, in the second example where you write this code:
For x = 10 To 5 Step -1
Console.WriteLine(x)
Next
How come x doesnt have to be declared first? Is x not a variable here? Sorry, just a little confused!
