How to make sure that a 4 number input is 4 getting numbers? [duplicate]

StackOverflow https://stackoverflow.com/questions/21683481

  •  09-10-2022
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Question

My input is a year in 4 digits between 1900-3000. So the input has to be 4 digits 1994, 2022,2950.

However, how do I check if the input is only 3 digits or less or 5 digigts or more? I have alread made an if statement if it's over 1900 or 3000.

   if (YearNumb<1900 || YearNumb>3000)
        {
            Console.WriteLine("Du angav inte ett år mellan 1900 och 3000.");
            Console.ReadLine();
            return;
Was it helpful?

Solution 

if (YearNumb<1900 || YearNumb>3000)
        {
            Console.WriteLine("Du angav inte ett år mellan 1900 och 3000.");
            Console.ReadLine();
            return;
        }
else if (YearNumb.ToString().Length != 4)
           {
            Console.WriteLine("text");
            Console.ReadLine();
            return;
        }

Convert to string and check length.

OTHER TIPS

ok,

if (YearNumb < 0)
{
    ...
} 
else if (YearNumb < 1000)
{
    ...
}
else if (YearNumb > 9999)
{
    ...
}
else if (YearNumb < 1900 || YearNumb > 3000)
{
    ...
}

Is probably more like what you are looking for.

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