my quizz

LoopFun.java

@@ -1,3 +1,5 @@
+package QuizWeek1;
+
 public class LoopFun
 {
 
@@ -8,7 +10,10 @@ public class LoopFun
        * @return the factorial of the number
        */
       public int factorial(int number){
-          return -1;
+          if(number==0){
+          return 1;}
+          else{
+          return number*factorial(number-1);}
       }
 
       /**
@@ -19,8 +24,10 @@ public class LoopFun
        * @return Upper case string of the first letter of each word
        */
       public String acronym(String phrase) {
-          return null;
-      }
+          //phrase= phrase.toLowerCase();
+          //String[] ph =phrase.split(" "); */
+          return phrase.replaceAll("[a-z ]", "").toUpperCase();
+        }
 
       /**
        * To prevent anyone from reading our messages, we can encrypt it so it will only be readable by its
@@ -35,6 +42,12 @@ public class LoopFun
        * @return the encrypted string by shifting each character by three character
        */
       public String encrypt(String word) {
+          char[] toEncode=word.toCharArray();
+          for(int i=0;i<toEncode.length;i++)
+          {
+            }
+          
           return null;
       }
+      
 }

LoopFunTest.java

@@ -1,3 +1,5 @@
+package QuizWeek1;
+
 
 
 import static org.junit.Assert.*;

MathUtilities.java

@@ -1,3 +1,5 @@
+package QuizWeek1;
+
 public class MathUtilities{
   /**
    * Add two number together
@@ -6,7 +8,7 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public int add(int num1, int num2){
-      return -1;
+      return (num1+num2);
   }
 
   /**
@@ -16,7 +18,7 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public double add(double num1, double num2){
-      return -1;
+      return (num1+num2);
   }
 
   /**
@@ -25,7 +27,7 @@ public class MathUtilities{
    * @return the half of the number in double
    */
   public double half(int number) {
-      return -1;
+      return ( (double) number/2);
   }
 
   /**
@@ -34,7 +36,12 @@ public class MathUtilities{
    * @return true if the number is odd, false if it is even
    */
   public boolean isOdd(int number){
-      return false;
+      if(number%2 == 0)
+      {return  false;
+        }
+        else
+        {return true;}
+      //return false;
   }
 
 
@@ -44,7 +51,7 @@ public class MathUtilities{
    * @return the result of the number multiply by itself
    */
   public int square(int number) {
-      return -1;
+      return number*number;
   }
 
 }

MathUtilitiesTest.java

@@ -1,3 +1,5 @@
+package QuizWeek1;
+
 
 
 import static org.junit.Assert.*;

StringUtilities.java

@@ -1,13 +1,41 @@
+package QuizWeek1;
+
 public class StringUtilities {
    public Character getMiddleCharacter(String word){
-       return null;
-   }
+       
+        int len= word.length();
+        int pos;
+        if(len%2 == 0)
+        {
+            pos=((len/2) -1) ;
+            
+        }
+        else
+        {
+            pos=len/2;
+            
+        }
+        return word.charAt(pos);
+    }
+       
+   
    
    public String removeCharacter(String value, char charToRemove){
-     return null;  
+       String r="";
+       for(int i=0; i < value.length() ;i++)
+       {
+        if(value.charAt(i) != charToRemove)
+        r=r+ value.charAt(i);
+        }
+     return r; 
    }
    
    public String getLastWord(String value) {
-       return null;
+       
+       String[] r= value.split(" ");
+       String lastWord= r [r.length -1];
+     
+       return lastWord;
    }
 }
+   

StringUtilitiesTest.java

@@ -1,3 +1,5 @@
+package QuizWeek1;
+
 import static org.junit.Assert.*;
 import org.junit.After;
 import org.junit.Before;