quizz answers

LoopFun.java

@@ -1,3 +1,7 @@
+
+
+
+
 public class LoopFun
 {
 
@@ -8,7 +12,9 @@ public class LoopFun
        * @return the factorial of the number
        */
       public int factorial(int number){
-          return -1;
+          return ( number == 1 || number == 0) ? 1: number * factorial (number - 1);
+          
+       
       }
 
       /**
@@ -19,7 +25,15 @@ public class LoopFun
        * @return Upper case string of the first letter of each word
        */
       public String acronym(String phrase) {
-          return null;
+          String s [] = phrase.split("(\s)+");
+          
+          for(String values : s)
+          { 
+              charBuffer.append(values.charAt(0));
+            }
+          
+          String b = charBuffer.toString() ;
+          return b;
       }
 
       /**

MathUtilities.java

@@ -6,7 +6,7 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public int add(int num1, int num2){
-      return -1;
+      return (int) (num1 + num2);
   }
 
   /**
@@ -16,7 +16,7 @@ public class MathUtilities{
    * @return the sum of the two numbers
    */
   public double add(double num1, double num2){
-      return -1;
+      return (double) (num1 + num2);
   }
 
   /**
@@ -25,7 +25,10 @@ public class MathUtilities{
    * @return the half of the number in double
    */
   public double half(int number) {
-      return -1;
+      int a = number / 2;
+      double d = a;
+      
+      return d ;
   }
 
   /**
@@ -34,6 +37,7 @@ public class MathUtilities{
    * @return true if the number is odd, false if it is even
    */
   public boolean isOdd(int number){
+      
       return false;
   }
 

StringUtilities.java

@@ -1,13 +1,19 @@
+import java.util.*;
+
 public class StringUtilities {
    public Character getMiddleCharacter(String word){
-       return null;
+       return word.charAt((word.length() - 1)/2);
    }
    
    public String removeCharacter(String value, char charToRemove){
-     return null;  
+  String a = value.substring(0, value.length() - 1);
+  return a; 
+   
+       // return value.substring(0, value.length() -1);
    }
    
    public String getLastWord(String value) {
-       return null;
+       
+       return value.substring(value.lastIndexOf(" ") +1) ;
    }
 }