C# Error 3 Use Of Unassigned Local Variable
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Use Of Unassigned Local Variable C# String
Sign up Why compile error “Use of unassigned local variable”? up vote 27 down vote favorite 5 My code is the following int tmpCnt; if (name == "Dude") tmpCnt++; Why is there an error Use of unassigned local variable tmpCnt? I
Use Of Unassigned Local Variable C# Decimal
know I didn't explicitly initialize it but due to Default Value Table a value type is initialized with 0 anyways. The reference also reminds me: Remember that using uninitialized variables in C# is not allowed. But why do I have to do it explicitly if it's already done by default? Wouldn't it gain performance if I wouldn't have to do it? Just wondering... c# .net compiler-construction share|improve this question asked Feb 10 '12 at 18:41 theknut 59521231 Can anyone help me use of unassigned local variable c# struct with the headline? Couldn't find a fitting for this one :-S –theknut Feb 10 '12 at 18:44 I have a local struct, never initialized, compiles with no errors. Today I created a different struct, treated identically, got "uninitialized local variable error". All its members were set to a value before use, but I could not first set it to null, since it was 'just' a struct. The struct that compiled contained only ints, bools and strings. The one that gave the error also contained DateTimes. "MyStructType myStruct = new MyStructType();" killed the error. Not the first time I've been bitten by missing something a few levels down. –mickeyf Jun 2 at 19:14 add a comment| 9 Answers 9 active oldest votes up vote 55 down vote accepted Local variables aren't initialized. You have to manually initialize them. Members are initialized, for example: public class X { private int _tmpCnt; // This WILL initialize to zero ... } But local variables are not: public static void SomeMethod() { int tmpCnt; // This is not initialized and must be assigned before used. ... } So your code must be: int tmpCnt = 0; if (name == "Dude") tmpCnt++; So the long and the short of it is, members are initialized, locals are not. That is why you get the compiler error. share|improve this answer answered Feb 10 '12 at 18:45 James Michael Hare 25.2k55168 3 Thanks! Didn't know about the difference on members and locals
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the use of unassigned local variable c# unity company Business Learn more about hiring developers or posting ads with us Stack Overflow use of unassigned local variable c# list Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 use of unassigned local variable c# try catch million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Use of unassigned local variable c# error up vote 0 down vote favorite As follows, when i debug it gives http://stackoverflow.com/questions/9233000/why-compile-error-use-of-unassigned-local-variable me the error : Error 1 Use of unassigned local variable 'moneyBet' I'm not sure what is wrong with the following code. I've never gotten something like that before. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace MyNotSoVeryFirstApplication { class Program { static void Main(string[] args) { bool stillGoing = true; int moneyBet; int moneyInBank = 0; //change 0 to amount held in actuality while (stillGoing == true) { Console.WriteLine("Money http://stackoverflow.com/questions/23230787/use-of-unassigned-local-variable-c-sharp-error in bank : {0}", moneyInBank); Console.WriteLine("----------------------------------------------------"); Console.Write("Enter amount you would like to bet: "); string moneybetString = Console.ReadLine(); try { moneyBet = Convert.ToInt32(moneybetString); } catch (FormatException e) { Console.WriteLine(e.Message); } catch (OverflowException e) { Console.WriteLine(e.Message); } finally { if (moneyBet > Int32.MaxValue) Console.WriteLine("You are about to bet {0}. Are you sure you want to bet this amount?", moneyBet); } } Console.WriteLine("Press any key to exit."); Console.ReadKey(); } } } c# variables share|improve this question asked Apr 22 '14 at 21:44 Daniel Lukish 3016 What happens if there's an exception during the Convert.ToInt32? –John Saunders Apr 22 '14 at 21:45 2 int moneyBet is never assigned –karthikr Apr 22 '14 at 21:46 add a comment| 5 Answers 5 active oldest votes up vote 1 down vote accepted You need to definitely assign moneyBet before you read it in the line: if (moneyBet > Int32.MaxValue) if Convert.ToInt32(moneybetString); throws an exception it will not be assigned. The specification describes the rules for definite assignment in try/finally blocks: 5.3.3.14 Try-finally statements For a try statement stmt of the form: try try-block finally finally-block • The definite assignment state of v at the beginning of finally-block is the same as the definite assignment state of v at the beginning of stmt. moneybetString is not definitely assigned before the t
SQL Server 2014 Express resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events Community Magazine Forums Blogs Channel 9 Documentation APIs and reference Dev centers Retired content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in https://social.msdn.microsoft.com/Forums/en-US/cf18e070-89bf-457c-96db-81a2ea2c0b27/use-of-unassigned-local-variable?forum=winforms 1 second. Ask a question Quick access Forums home Browse forums users FAQ Search related threads Remove From My Forums Answered by: Use of unassigned local variable Windows Forms > Windows Forms General Question 0 Sign in to vote I'm an extreme noob with C# - as in I took a tutorial yesterday and today I'm writing my first program. Not surprisingly I'm running into a problem. The issue is "use of unassigned local variable" and it's happening for the variables Question1 use of through Question5. The program consists of five questions and the user will select one of three possible answers for each. I've assigned a number value to each radio button and when they click the Submit button, I add those values together and assign them to varResults. Based on the value of varResults, a messagebox is shown telling you which Walking Dead character you are most like. using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; use of unassigned namespace WalkingDeadQuiz { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { int Question1; int Question2; int Question3; int Question4; int Question5; int varResults; if (radioButton1.Checked) { Question1 = 1; } else if (radioButton2.Checked) { Question1 = 2; } else if (radioButton3.Checked) { Question1 = 3; } if (radioButton4.Checked) { Question2 = 1; } else if (radioButton5.Checked) { Question2 = 2; } else if (radioButton6.Checked) { Question2 = 3; } if (radioButton7.Checked) { Question3 = 1; } else if (radioButton8.Checked) { Question3 = 2; } else if (radioButton9.Checked) { Question3 = 3; } if (radioButton10.Checked) { Question4 = 1; } else if (radioButton11.Checked) { Question4 = 2; } else if (radioButton12.Checked) { Question4 = 3; } if (radioButton13.Checked) { Question5 = 1; } else if (radioButton14.Checked) { Question5 = 2; } else if (radioButton15.Checked) { Question5 = 3; } varResu