C# program to take a year as input and tells whether it's a leap year or not

Following program shows you how take a year as input and tells whether it's a leap year or not.

using System;

class MainClass {
  public static void Main (string[] args) {
    Console.WriteLine("Enter a year:");
    int input = Convert.ToInt32(Console.ReadLine());
    if (input % 4 == 0) {
      if (input % 100 == 0) {
        if (input % 400 == 0) {
      Console.WriteLine(input + " its a leap year");
      } else {
        Console.WriteLine(input + " its not a leap year");
      }
      } else {
        Console.WriteLine(input + " its a leap year");
      }
      } else {
        Console.WriteLine(input + " its not a leap year");
      }
  }
}

Output:

Example1:

Enter a year:
 2020
2020 its a leap year

Example2:

Enter a year:
 2030
2030 its not a leap year