Not All Code Paths Return A Value Error In C#
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Not All Code Paths Return A Value Try Catch
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Not All Code Paths Return A Value In Mvc
a minute: Sign up c# returning error “not all code paths return a value” up vote 17 down vote favorite 6 I'm trying to write code that returns whether or not a given integer is or is not divisible evenly not all code paths return a value in asp.net c# by 1 to 20, but i keep receiving "error CS0161: 'ProblemFive.isTwenty(int)': not all code paths return a value" Please help. Here is my code: public static bool isTwenty(int num) { for(int j = 1; j <= 20; j++) { if(num % j != 0) { return false; } else if(num % j == 0 && num == 20) { return true; } } } c# share|improve this question asked Jan 17 '14 at 20:47 user115185 89114 migrated from programmers.stackexchange.com Jan 17 not all code paths return a value ienumerator '14 at 22:48 This question came from our site for professionals, academics, and students working within the systems development life cycle who care about creating, delivering, and maintaining software responsibly. 5 Your code doesn't make sense but the error message is quite clear. You need to return a value even if both your if conditions are false for 20 iterations. –ChaosPandion Jan 17 '14 at 20:52 4 You're thinking like a human, not a compiler. The compiler doesn't know what you are thinking, or how the logic is supposed to flow (past optimization). What happens if a value doesnt match either 'if'? –GrandmasterB Jan 17 '14 at 21:08 add a comment| 6 Answers 6 active oldest votes up vote 34 down vote You're missing a return statement. When the compiler looks at your code, it's sees a third path (the else you didn't code for) that could occur but doesn't return a value. Hence not all code paths return a value. For my suggested fix, I put a return after your loop ends. The other obvious spot - adding an else that had a return value to the if-else-if - would break the for loop. public static bool isTwenty(int num) { for(int j = 1; j <= 20; j++) { if(num % j != 0) { return false; } else if(num % j == 0 && num == 20) { return true; } } return false; //This is your
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Not All Code Paths Return A Value In Asp.net Mvc
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Not All Code Paths Return A Value Unity C#
up C#: Error. Not all code paths return a value up vote 0 down vote favorite I'm working on a project in C# and I have created the following function: static bool detectIfRepeated(OleDbConnection cnx, String username) { DataTable res = new DataTable(); http://stackoverflow.com/questions/21197410/c-sharp-returning-error-not-all-code-paths-return-a-value OleDbDataAdapter adp = new OleDbDataAdapter("SELECT * FROM UserPassword", cnx); adp.Fill(res); int i = 0; bool found = false; String user = Convert.ToString(res.Rows[i]["User"]); while (i < res.Rows.Count && !found) { if (user == username) { found = true; MessageBox.Show("The username is already taken. Choose a different one."); return true; } else i++; } if (!found) return false; } However, I don't know why (I've been trying to look for the mistake for one hour) I'm getting the error: Not all code paths return a value. http://stackoverflow.com/questions/27079242/c-error-not-all-code-paths-return-a-value I can't see why not, the program navigates on the list if it finds that usernames are the same it returns true; if it has not find any coincidence after the whole loop it returns false. Please can anyone help me find it? I'm sure it has to be a silly mistake but I am getting crazy... Thank you so much!! c# loops search share|improve this question edited Nov 22 '14 at 15:53 Sam Greenhalgh 3,956829 asked Nov 22 '14 at 15:46 user3780731 456 1 I'm not able to see the reason for the "found" variable in this code. When you initiate it, you initiate it to false, the only time you change it is right before you return true, and then you're not checking against it. Also, the only time you're checking the value of found is when you're outside the loop, but then it's guaranteed to be false (since the only place you change it on is right before a return) So, what I'm trying to say is that you could remove the found variable and the lines that change or check it and your code would do the exact same thing (without the compiler complaining) –Fabian Miiro Nov 22 '14 at 16:01 add a comment| 3 Answers 3 active oldest votes up vote 0 down vote accepted You could just return the variable found that you have declared static bool detectIfRepeated(OleDbConnection cnx, String username) { DataTable res = new DataTable(); OleDbDataAdapter adp = new OleDbDataAdapter("SE
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