// BookQuantity Check
public bool bookQuantityCheck(string bookQuantity)
{
if (string.IsNullOrWhiteSpace(bookQuantity))
{
print.bookQuantityOverMessage();
return(true);
}
if (stringCheck(bookQuantity, 5))
{
print.ErrorMessage();
return(true);
}
if (bookQuantity.Length == 0 || bookQuantity.Length >= 3)
{
print.ErrorMessage();
return(true);
}
return(false);
}