The challenge

Alex just got a new hula hoop, he loves it but feels discouraged because his little brother is better than him

Write a program where Alex can input (n) how many times the hoop goes round and it will return him an encouraging message 🙂

  • If Alex gets 10 or more hoops, return the string “Great, now move on to tricks”.
  • If he doesn’t get 10 hoops, return the string “Keep at it until you get it”.

The solution in Java code

Option 1:

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public class HelpAlex{
  public static String hoopCount(int n){
     return n >= 10 ? "Great, now move on to tricks" : "Keep at it until you get it";
  }
}

Option 2:

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public class HelpAlex{
  public static String hoopCount(int n){
    
    if ( n < 0 ) {
      return "Error";
    } else if (n >= 0 && n < 10) {
      return  "Keep at it until you get it";
    } else {
      return "Great, now move on to tricks";
    }
  
  }
}

Option 3:

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public class HelpAlex{
  private static final String GREAT = "Great, now move on to tricks";
  private static final String KEEP = "Keep at it until you get it";
  
  public static String hoopCount(int n){
   return n >= 10 ? GREAT : KEEP;
  }
}

Test cases to validate our solution

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import org.junit.Test;
import static org.junit.Assert.assertEquals;

public class HoopCountTest {
    @Test
    public void testHoopCount(){
        assertEquals("Great, now move on to tricks", HelpAlex.hoopCount(11));
        assertEquals("Keep at it until you get it", HelpAlex.hoopCount(7));        
    }
}