how to ask input using char

Question

I got an error called 'unable to convert string to char' i used the statement con = (char)(Console.Read()); Newbie here Please Help

Vulpes · Answer

If you want return to be pressed after the choice, then I'd do it like this: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Csharp_exercises { class Program { static void Main(string[] args) { char choice; char con ='y'; Console.WriteLine("What is the command keyword to exit a loop in C#?"); Console.WriteLine("a.quit"); Console.WriteLine("b.continue"); Console.WriteLine("c.break"); Console.WriteLine("d.exit"); while (con=='y') { Console.Write("
Enter your choice:"); string input = Console.ReadLine(); if (input.Length != 1) continue; choice = input[0]; if (choice == 'c') { Console.WriteLine("Congratulation!"); } else if (choice == 'q' || choice == 'e') { Console.WriteLine("Exiting...!"); break; } else Console.WriteLine("Incorrect!"); Console.Write("Again? press y to continue:"); input = Console.ReadLine(); if(input.Length == 1) { con = input[0]; } else break; } } } }

lendon medalle · Answer

Thanks for the help vulpes. I really appreciate it :D +1

lendon medalle · Answer

Thank you for the help Vulpes, but as far as i know i think it is customary to let the user hit Enter or Okay. is it possible too using char? without exiting the program after choice was made? I put already a Console.ReadLine(); at the end of the while loop but still the program exit without permission with me.

Vulpes · Answer

I wouldn't use Console.Read() to get character input as it works in a very strange way - I'd use Console.ReadKey() instead which also has the advantage that the user doesn't have to press the enter key to accept the input. Try this: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Csharp_exercises { class Program { static void Main(string[] args) { char choice; char con='y'; Console.WriteLine("What is the command keyword to exit a loop in C#?"); Console.WriteLine("a.quit"); Console.WriteLine("b.continue"); Console.WriteLine("c.break"); Console.WriteLine("d.exit"); while (con=='y') { Console.Write("
Enter your choice:"); choice = Console.ReadKey().KeyChar; if (choice == 'c') { Console.WriteLine("
Congratulation!"); } else if (choice == 'q' || choice == 'e') { Console.WriteLine("
Exiting...!"); break; } else Console.WriteLine("
Incorrect!"); Console.Write("Again? press y to continue:"); con = Console.ReadKey().KeyChar; } } } }

lendon medalle · Answer

This is a code from www.worldbestlearningcenter.com and i changed some of data type char from string. Sorry for copying it. by the time i input an answer the output will be like Incorrect! Again? press y to continue: -> then it just exit with no prompt. Congratulations! Again? press y to continue: -> then it just exit with no prompt. using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Csharp_exercises { class Program { static void Main(string[] args) { char choice; char con='y'; Console.WriteLine("What is the command keyword to exit a loop in C#?"); Console.WriteLine("a.quit"); Console.WriteLine("b.continue"); Console.WriteLine("c.break"); Console.WriteLine("d.exit"); while (con=='y') { Console.Write("Enter your choice:"); choice = (char)(Console.Read()); if (choice == 'c') { Console.WriteLine("Congratulation!"); } else if (choice == 'q' || choice == 'e') { Console.WriteLine("Exiting...!"); break; } else Console.WriteLine("Incorrect!"); Console.Write("Again? press y to continue:"); con = (char)(Console.Read()); } } } }

Vulpes · Answer

Well, Console.Read() returns an integer - not a string - so that code should in fact work because there is a conversion from int to char. If you'd have used Console.ReadLine() instead of Console.Read() then you would have got the "unable to convert string to char" error because that method returns a string rather than an int. So, I suspect the error is not occurring on that line but somewhere else?

how to ask input using char

Answers (6)