Quiz

LoopFun.java

@@ -8,7 +8,11 @@ public class LoopFun
        * @return the factorial of the number
        */
       public int factorial(int number){
-          return -1;
+          int fact = 1;
+          for(int i = 1; i <= number; i++) {
+              fact *= i;
+          }
+          return fact;
       }
 
       /**
@@ -19,7 +23,13 @@ public class LoopFun
        * @return Upper case string of the first letter of each word
        */
       public String acronym(String phrase) {
-          return null;
+          String acro = "";
+          String[] newPhrase = phrase.split(" ");
+          for (int i = 0; i < newPhrase.length; i++) {
+              acro += newPhrase[i].substring(0,1);
+            }
+          
+          return acro.toUpperCase();
       }
 
       /**
@@ -35,6 +45,12 @@ public class LoopFun
        * @return the encrypted string by shifting each character by three character
        */
       public String encrypt(String word) {
+          //String newWord = "";
+          //String[] letters = word.split("");
+          //for (int i = 0; i <letters.length; i++) {
+            //  newWord += letters[i]
+              
+          //}
           return null;
       }
 }

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 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 num1 + num2;
   }
 
   /**
@@ -25,7 +25,7 @@ public class MathUtilities{
    * @return the half of the number in double
    */
   public double half(int number) {
-      return -1;
+      return number / 2.0;
   }
 
   /**
@@ -34,7 +34,11 @@ 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 true;
+      } else {
+          return false;
+        }
   }
 
 
@@ -44,7 +48,7 @@ public class MathUtilities{
    * @return the result of the number multiply by itself
    */
   public int square(int number) {
-      return -1;
+      return number * number;
   }
 
 }

StringUtilities.java

@@ -1,13 +1,22 @@
 public class StringUtilities {
    public Character getMiddleCharacter(String word){
-       return null;
+       
+       
+       return word.charAt(word.length() /2);
    }
    
    public String removeCharacter(String value, char charToRemove){
-     return null;  
+       String newValue = "";
+       for (int i = 0; i < value.length(); i++) {
+           if (value.charAt(i) != charToRemove) {
+               newValue += value.charAt(i);
+            }
+        }
+       return newValue;
    }
    
    public String getLastWord(String value) {
-       return null;
+       
+       return value.substring(value.lastIndexOf(" ") +1);
    }
 }