Hi i am doing very basic c# coding where just checking odd and even number however how i can re-enter input while i am converting a string into integer at one place.
if (i % 2==0) { Console.WriteLine("even"); Console.WriteLine("enter again", i); } else if(i%2!=0) { Console.WriteLine("odd"); Console.WriteLine("enter again", i); enter code here } Console.ReadKey(); Basically you need a loop and you could make it stop when the user enters a non-integer value.
int i; Console.WriteLine("enter a number"); while(int.TryParse(Console.ReadLine(), out i)) { Console.WriteLine(i%2 == 0 ? "even" : "odd"); Console.WriteLine("enter again"); } You want to do something like that ?
static void Main(string[] args) { var l = string.Empty; while (l != "exit") { l = Console.ReadLine(); int i; if (!int.TryParse(l, out i)) continue; Console.WriteLine(i%2 == 0 ? "even" : "odd"); Console.WriteLine("enter again"); } Console.ReadLine(); } 
else if? i % 2 is 0 or not 0 :)
i in Console.WriteLine("enter again", i); since there are no format items in the string.
static void Main() { string userChoice,number; int checkInt; Console.WriteLine("Do you want check even/odd number?y/n"); userChoice = Console.ReadLine(); if (userChoice.ToLower().Equals("y")) { do { Console.WriteLine("Please enter your number"); number = Console.ReadLine(); if (int.TryParse(number, out checkInt)) { if ((checkInt % 2) == 0) { Console.WriteLine("Your entered number {0} is even", checkInt); } else { Console.WriteLine("Your entered number {0} is odd", checkInt); } } else { Console.WriteLine("Plesae enter integer value"); } Console.WriteLine("Do you want check even/odd number?y/n"); userChoice = Console.ReadLine(); } while (userChoice.ToLower().Equals("y")); } } I suppose you need a loop that ask you to insert a new number until it is convertible into a integer number.
I suggest you this possible solution
static int ReadInput(string message) { int n = 0; do { Console.WriteLine(message); } while (!int.TryParse(Console.ReadLine(), out n)); return n; } static void Main(string[] args) { int i = ReadInput("Enter a Number"); if (i % 2==0) { Console.WriteLine("even"); } else if(i%2!=0) { Console.WriteLine("odd"); //enter code here } } } In order to convert String into int for a even odd program, the following code can work out -
static void Main(string[] args) { int i; Console.Write("Enter a Number : "); i = int.Parse(Console.ReadLine()); if (i % 2 == 0) { Console.Write("Entered Number is an Even Number"); Console.Read(); } else { Console.Write("Entered Number is an Odd Number"); Console.Read(); } } What you want is a really fast method:
If (rowNum % 2 == 0) Print even row color info Else Print odd row color info
