How do i create a code in C# that it tests age

Question

How do i create a simple code that tests if you are old (>29), getting old (19-30), a teenager (13-19) or a child <13)

i need to incorporate if statements

Answer 1

Based on your question, I assume, you have a DateTime object. See the following code that finds the age and compare it with DateTime.Now

DateTime dob = new DateTime(2000, 1, 1);
if(DateTime.Now.Year - dob.Year >29)
{
    Console.WriteLine("You are old");
}
else if(DateTime.Now.Year - dob.Year > 19)
{
    Console.WriteLine("You are getting old");
}
else if(DateTime.Now.Year - dob.Year > 12)
{
    Console.WriteLine("You are teenager");
}
else
{
    Console.WriteLine("You are a child");
}

Answer 2

Try this out.

• Between works on int, decimal, DateTime
• Note the IsChild extension, you can create others to e.g. IsAdult, IsTeenAger etc

Code sample

using System;
using System.Collections.Generic;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {

            int age = 29;

            Console.WriteLine($"{age,-3} {age.Between(30, 30)}");

            age = 30;
            Console.WriteLine($"{age,-3} {age.Between(30, 30)}");

            age = 30;
            Console.WriteLine($"{age,-3} {age.Between(19, 30)}");

            age = 12;
            Console.WriteLine($"{age,-3} {age.Between(1, 12)}");

            Console.WriteLine(age.IsChild().ToYesNoString());

            Console.Read();
        }
    }

    public static class GenericExtensions
    {
        public static bool Between<T>(this T value, T lowerValue, T upperValue) where T : struct, IComparable<T> 
            => Comparer<T>.Default.Compare(value, lowerValue) >= 0 && 
               Comparer<T>.Default.Compare(value, upperValue) <= 0;

        public static bool IsChild(this int sender) 
            => sender.Between(1, 12);

        public static string ToYesNoString(this bool value) 
            => value ? "Yes" : "No";
    }
}