Error 3 Use Of Unassigned Local Variable
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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 company Business Learn more error use of unassigned local variable c# about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users error 1 use of unassigned local variable c# Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping use of unassigned local variable unity each other. Join them; it only takes a minute: Sign up Use of unassigned local variable error C# up vote 0 down vote favorite This is with regard to previous question posted a while ago Remove -1 entry from
Use Of Unassigned Local Variable String
integer array I know there are blazing fast solutions , one line answers as posted in answer section to previous posted question , but being a newbie I tried doing by for loops. int[] arr = new int[]{ 1, -1, -1, 1 }; int[] new_arr; int index = 0; for (int i = 0; i < arr.Length; i++) { // Console.WriteLine(arr[i]); if (arr[i] == -1) continue; else new_arr[index++] = arr[i]; } I am getting error Use of use of unassigned local variable array unassigned local variable 'new_arr' what am I doing wrong. EDIT int[] arr = new int[]{ 1, -1, -1, 1 }; int[] new_arr = new[arr.Length]; //Error being shown at this line int index = 0; for (int i = 0; i < arr.Length; i++) { if (arr[i] == -1) continue; else new_arr[index++] = arr[i]; } for(int j=0;j
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Use Of Unassigned Local Variable Datetime
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Use Of Unassigned Local Variable List
other. Join them; it only takes a minute: Sign up Fixing the 'Use of unassigned local variable' with a null assignment. Why? up vote 17 down vote favorite 1 With a piece of code like this, the compiler http://stackoverflow.com/questions/12833857/use-of-unassigned-local-variable-error-c-sharp complains on c.MyProperty: MyClass c; try { throw new Exception(); } catch (Exception) { } c.MyProperty = 2; // "Use of unassigned local variable 'c'". Yet it doesn't complain if you assign a null to c in initialization: MyClass c = null; try { throw new Exception(); } catch (Exception) { } c.MyProperty = 2; // no complains this time. So, why does this work? If c wasn't assigned a null and the compiler hypothetically allowed it, wouldn't http://stackoverflow.com/questions/6213113/fixing-the-use-of-unassigned-local-variable-with-a-null-assignment-why the same exception be thrown at c.MyProperty, Object reference not set to an instance of an object? c# exception variable-assignment share|improve this question asked Jun 2 '11 at 10:10 Andreas Grech 52k81248326 Hmm, that is interesting, my guess would be though that this code (second version) would still throw an exception at Runtime.. it's likely just a visual studio issue that is not picking up the null assignment - Just a guess ? –Dave Long Jun 2 '11 at 10:13 1 Take a look to stackoverflow.com/questions/4770426/… –Haplo Jun 2 '11 at 10:17 add a comment| 4 Answers 4 active oldest votes up vote 37 down vote accepted When you assign null to the variable you're telling the compiler to back off because you know better than him so he should not complain about this. This is probably due to the fact that assigning null is considered to imply an explicit action by the developer. share|improve this answer answered Jun 2 '11 at 10:12 Joao Angelo 31.2k57598 1 Although that made me laugh, I'm still not closer to an answer. –Andreas Grech Jun 2 '11 at 10:13 6 @Andreas: This is the actual answer, this is why it is allowed. C# will let you intentionally shoot your self in the foot. It just won't let you do it unintentionally. –Binary Worrier Jun 2 '11 at 1
am currently writing this C# program for a C# class I am taking and I have the correct formula which is Future Value=PresentValue*(1=Rate)Year the issue I am having is there is an error message for the futureValue= presentValue, the presentValue has the message https://www.daniweb.com/programming/software-development/threads/417130/c-use-of-unassigned-local-variable-error Use of unassigned local variable 'presentValue' and I did declare it in the beginning using double presentValue and its still giving me that message how do I fix this problem. 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; namespace Future_Value_List_view { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { double rate, year, presentValue, futureValue; string lineOutput; listBox1.Items.Add("Rate/Year 5 use of 10 15 20"); for (rate = 0.03; rate <= .05; rate += .005) { lineOutput = rate.ToString("p2"); for (year = 5; year <=20; year +=5) { futureValue = presentValue * Math.Pow(1 + rate, year); lineOutput = lineOutput + " " + futureValue.ToString("C"); } listBox1.Items.Add(lineOutput); } rate.ToString("p"); } } } ipodtrip 3 posts since Feb 2012 Newbie Member 2Contributors 1Reply 7Views 4 YearsDiscussion Span 4 Years Ago Last Post by Mitja Bonca 0 Mitja Bonca 557 4 Years Ago use of unassigned When you instanitate new variables, specify their beggining values, like: //instead of: double rate, year, presentValue, futureValue; //do: double rate = 0, year = 0, presentValue = 0, futureValue = 0; c# This article has been dead for over six months. Start a new discussion instead. Message Insert Code Snippet Alt+I Code Inline Code Link H1 H2 Preview Submit your Reply Alt+S Ask a Different Software Development Question Related Articles c# Global Variable 6 replies I'm new to c# programming, and I am a little stuck on how to make a variable available across multiple forms. I read that i … delete all files and folders in a directory but leave the directory 29 replies hi all I want to write a visual C# programs that delete all files and folders in specific directory but leave the parents directory like … Visual Basic 10 1 reply Hello, I am trying to build a Football Scoreboard and I have performed alot of editing but I am getting hung up on this error … C# pass Selected item from listview1 form1 to label in form 2 l 3 replies Hi! I'm writing little software just to get some practice in c#. I have listview in form 1 where program displays first name and last … Storing text data into multiple arrays 5 replies Hello, I am working on a project and I am c