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Logic Error In Vb.net

Always declare your variables as a type as well (Dim tSize is missing its type) Followup to your edits: This: Function checkForByte(ByVal checkUserSize) Should be this: Function checkForByte(ByVal checkUserSize As Long) I am at a loss on how to fix this! This seams to be an avoidable fact of life. Another point is that I am not using Microsoft.VisualBasic namespace in the above code, and switched to Substring instead. http://robertwindows.com/logic-error/logic-error-example.html

Debugging Statements Executing One Statement at a Time Just as done when reading code with your eyes, the most basic way to monitor code is to execute one line at intOne doesn't seem to be affected at all by the function that I have created to determine what intOne's value should be. int average(int a, int b) { return a + b / 2; /* should be (a + b) / 2 */ } See also[edit] Software Testing portal Syntax error Off-by-one error Need Help Keno Logic Error Driver License Exam Problem Logic Error Only Two Message Boxes -- Error Possible Logic Error? https://msdn.microsoft.com/en-us/library/shz02d41.aspx

These are called Subroutines not Functions, and you'll find it's easier if you declare and write them as Subroutines also. –RBarryYoung Dec 29 '12 at 21:14 Option Explicit would Get 10 Days Free Prev Runtime Error Handling Next Error Constants Explore Tour Pricing Enterprise Government Education Queue App Learn Blog Contact Careers Press Resources Support Twitter GitHub Facebook LinkedIn Terms This allows you to monitor the values of variables and see their respective values up to a critical section.

What is this aircraft with elaborate folding wings? With a logic error, the Code Editor does not see anything wrong in the document and therefore cannot point out a problem. current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Application: Using Breakpoints In the Code Editor, click the margin on the left side of FutureValue = Principal + InterestAmount On the main menu, click Debug -> Start Debugging Click OK

Some of them manifest themselves while you are developing your project. But if the file is corrupted, the application cannot carry out the Open function, and it stops running. When debugging, you choose what procedures to step into and which ones to step over. http://www.functionx.com/visualbasic/exceptions/ied.htm Syntax errors are easy to find and correct because the development system finds them for you.

Sometimes you will want to suspend or stop debugging. When the computer tried to multiply the pay rate by "ten", it generated the error message shown above. This is a logic error: when you don't get the answer you thought you'd get. Published by O'Reilly Media, Inc.

This also allows you to know if a procedure is behaving as expected. a fantastic read Detecting Logical ErrorsTo detect a logical error, we place error-detection code immediately following the potential offender. The Basics 1. Your coding errors.

So this: intOne = intOne / 1024 ^ 3 is the same as this: intOne = 0 / 1024 ^ 3 which is of course this: intOne = 0 As an http://robertwindows.com/logic-error/java-logic-error-example.html If so, both can be replaced with the above approach. The programmer probably meant to type "14". create an XML file to store your values, but keep the code clean.

You can add something like this to the click event of each of the radio buttons. Is the equation pH+pOH=14 still valid at a different temperature? Here is the problem I have the program and it compiles just fine. weblink These are often discovered when the user enters illegal data.

In some cases, we will see how you can suspend debugging. Unlike a program with a syntax error, a program with a logic error is a valid program in the language, though it does not behave as intended. Normally, when you start debugging, the Locals window shows automatically.

How could a smaller country successfully take control of a much larger country?

It just didn't give you the answer you expected - it was a logic error. To support this, you use a feature named Step Over. Use Dim intTwo As Integer = 0 instead. Dim intTwo As Integer = Nothing doesn't do anything useful.

Logic errors can be fairly simple to track down and solve. (The problem above can be solved by changing the variable types from Integer to Single or Double.) But they can The best content for your career. That means, Logic errors are those that appear once the application is in use. http://robertwindows.com/logic-error/example-of-logic-error.html When the button was clicked, a Runtime exception did not crash the programme.

When you compile your application in the development environment, the compiler would point out where the problem is so you can fix it instantly. Public Class Form1 Private tSize As System.Drawing.Size Private checkUserSpeed As Long = 0 Private checkBitByte As Integer = 0 Private setSize As Integer = 0 Private checkUserSize As String = "" Salary A Simple Custom Control (focussed TextBox) Using recursion to create a program to backup folders Idustrial process regulation using a VB.NET PID controller Exploring DataGridView (ComboBox, Checkbox, Increment, BindingSource) Exploring Language Elements by Category C.

Sorry, to sound stupid but are you saying in the option function I need to change them? How come the Sun's gravity can hold distant planets in orbit, but cannot rip humans off Earth? The programme executed, and did not "bug out" on us. Any errors you find later will then stand out like white crows.

Vim: what are all the possible swapfile extensions? For example, in the above scenario, you would feed intOne through a parameter, rather than a global variable.