I have input problem...! plz solve this

Question

hi em new in C# my problem is that i want to take input as integer value.....!

if user gives input <0 and >999 then it takes again input until they enter correct integer.


{
int mynum;
String number;

Console.WriteLine("Please Enter the roll number");

number = Console.ReadLine();// this is used for take input as a string

mynum = int.Parse(number); // this is used for to convert String nto integer.
if(mynum < 0 || mynum > 999)
{


Console.WriteLine("Please Enter the roll number");

// i know while loop is execute here bt i dont know how to use it.


}