public class Friday {
   public static void main(String[] args) {
      int x = 18;
      int y = 29;
      // int maximum = Math.max(18, 29);
      System.out.println("maximum is " + Math.max(18, 29));
      
      // take an age, divide by 2, add 7
      // int minAge = 18 / 2 + 7;
      int minAge = calcMinDatingAge(18); // --> int minAge = 16;
      System.out.println("the minimum dating age for an 18 year old is : " + minAge);
      int maxAge = calcMaxDatingAge(18);
      System.out.println("the maximum dating age for an 18 year old is : " + maxAge);
      
      // three parts to writing a method that returns a value: 
      //    return statement
      //    change the return type in the header
      //    catch/use the value
      
      int minAge2 = calcMinDatingAge(23);
      System.out.println("the minimum dating age for an 23 year old is : " + minAge2);
      int maxAge2 = calcMaxDatingAge(23);
      System.out.println("the maximum dating age for an 23 year old is : " + maxAge2);

   }
   
   public static int calcMinDatingAge(int age) {
      int minAge = age / 2 + 7;      
      return minAge;
   }
   
   // take the age, subtract 7, multiply by 2
   public static int calcMaxDatingAge(int age) {
      int maxAge = (age - 7) * 2;
      return maxAge;
   }
}