i am very new to c# and while loops. Does anyone know how to stop it? it keeps printing the first if statement. Here is the code:

   const int Year = 400;
            const int LeapYear = 4;
            const int NoLeapYear = 100;
            int input = 0;
            input = int.Parse(Console.ReadLine());

            while (input != 0)
            {
                Console.WriteLine("Enter a number: ");
                if (input > 0 && input % LeapYear == 0 || input % Year == 0)
                {
                    Console.WriteLine($"{input} is a leap year.");
                }
                if (input > 0 && input % NoLeapYear != 0)
                {
                    Console.WriteLine($"{input} is not a leap year.");
                }
                if (input < 0)
                {
                    Console.WriteLine("Year must be positive!");
                }
                if (input == 0)
                {
                    Console.WriteLine("End of program");
                }
            }
     

CodePudding user response：

You have to read the input inside the while loop:

const int Year = 400;
const int LeapYear = 4;
const int NoLeapYear = 100;
int input = -1; // initialize to something different than zero, to enter the while loop (or use do while loop instead of while loop)
while (input != 0)
{
    Console.WriteLine("Enter a number: ");
    input = int.Parse(Console.ReadLine()); // you were missing this line
    if (input > 0 && input % LeapYear == 0 || input % Year == 0)
    {
        Console.WriteLine($"{input} is a leap year.");
    }
    if (input > 0 && input % NoLeapYear != 0)
    {
        Console.WriteLine($"{input} is not a leap year.");
    }
    if (input < 0)
    {
        Console.WriteLine("Year must be positive!");
    }
    if (input == 0)
    {
        Console.WriteLine("End of program");
    }
}

Consider using a do while loop in this case.

CodePudding user response：

If you are using loop just and break to true statement It will breaks it

CodePudding user response：

while (input != 0) {
    conditions;
    break; // Breaks the loop
}

Use the break; keyword to stop any loop in C# not just C# in many languages also break is used to stop loops

Or,

Satisfy the condition to opposite of what you have it will break/stop the loop

CodePudding user response：

use break (https://www.w3schools.com/cs/cs_break.php)

int i = 0;
while (i < 10) 
{
  Console.WriteLine(i);
  i  ;
  if (i == 4) 
  {
    break;
  }
}