boolean div4 = ((yr%4)==0);

Week 1: Types, condition clauses and loops/11. Leap year?

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+'''
+Write a program that asks the user for the year and indicates whether the given year is a leap year or not.
+
+A year is a leap year if it is evenly divisible by four.
+However, a year divided by 100 is a leap year only if it is also divided by 400.
+
+
+So, for example, 2000 and 2004 are leap years, but 1900 is not.
+
+Example output 1:
+Give a year: 1984
+Is a leap year
+
+
+Example 2:
+Give a year: 1983
+Not a leap year
+'''
+
+
+import java.util.Random;
+import java.util.Scanner;
+
+
+
+public class Test{
+    public static void main(String[] args){
+        final Random r = new Random();
+        
+        Scanner reader = new Scanner(System.in);
+        System.out.print("Give a year: ");
+        int yr = Integer.valueOf(reader.nextLine());
+
+        boolean div4 = ((yr%4)==0);
+        boolean div100 = ((yr%100)==0);
+        boolean div400 = ((yr%400)==0);
+
+        if (div100) {
+          if (div400) {
+            System.out.println("Is a leap year");
+          }
+          else {
+            System.out.println("Not a leap year");
+          }
+        }
+        else if (div4) {
+            System.out.println("Is a leap year");
+        }         
+        else {
+          System.out.println("Not a leap year");
+        }
+               
+
+        
+    }
+}
+
+
+
+'''Testing with input 1984
+Give a year: 1984
+Is a leap year
+
+Testing with input 1983
+Give a year: 1983
+Not a leap year
+
+Testing with input 1900
+Give a year: 1900
+Not a leap year
+
+Testing with input 2000
+Give a year: 2000
+Is a leap year
+
+Testing with input 2002
+Give a year: 2002
+Not a leap year
+
+Testing with input 2004
+Give a year: 2004
+Is a leap year
+
+Testing with input 2020
+Give a year: 2020
+Is a leap year
+
+Testing with input 2018
+Give a year: 2018
+Not a leap year
+
+Testing with input 1800
+Give a year: 1800
+Not a leap year
+
+Testing with input 1700
+Give a year: 1700
+Not a leap year
+
+
+
+'''