finished numbers and triangles

java/src/main/java/io/zipcoder/microlabs/mastering_loops/NumberUtilities.java

@@ -4,38 +4,77 @@
 public class NumberUtilities {
 
     public static String getExponentiations(int start, int stop, int step, int exponent) {
-        return null;
+        String result = "";
+
+        for(int i = start; i < stop; i+=step){
+            result+=(int)(Math.pow(i, exponent));
+        }
+        return result;
     }
 
     public static String getRange(int start, int stop, int step) {
-        return null;
+        String result = "";
+
+        for(int i = start ; i < stop; i+=step){
+            result+= i;
+        }
+        return result;
     }
 
     public static String getRange(int start, int stop) {
-        return null;
+        String result = "";
+
+        for(int i = start ; i < stop; i++){
+            result+= i;
+        }
+        return result;
     }
 
     public static String getRange(int stop) {
-        return null;
+        String result = "";
+
+        for(int i = 0 ; i < stop; i++){
+            result+= i;
+        }
+        return result;
     }
 
     /*
      * natural break
      */
 
-    public static boolean isNumberEven(int toTest) { return false; }
-    public static boolean isNumberOdd(int toTest) { return false; }
+    public static boolean isNumberEven(int toTest) { return toTest%2==0; }
+    public static boolean isNumberOdd(int toTest) { return toTest%2!=0; }
 
     public static String getEvenNumbers(int start, int stop) {
-        return null;
+        String result = "";
+
+        for(int i = start ; i < stop; i++){
+            if(isNumberEven(i))
+                result+=i;
+        }
+        return result;
+
     }
 
     public static String getOddNumbers(int start, int stop) {
-        return null;
+        String result = "";
+
+        for(int i = start ; i < stop; i++){
+            if(isNumberOdd(i))
+                result+=i;
+        }
+        return result;
+
     }
 
     public static String getSquareNumbers(int start, int stop, int step) {
-        return null;
+        String result = "";
+
+        for(int i = start ; i < stop; i+=step){
+            result+=i*i;
+        }
+        return result;
     }
 
 }

java/src/main/java/io/zipcoder/microlabs/mastering_loops/TableUtilities.java

@@ -2,14 +2,30 @@
 
 public class TableUtilities {
     public static String getMultiplicationTable(int tableSize) {
-        return null;
+
+        String result = "";
+
+        for (int i = 1; i < tableSize + 1; i++) {
+            for (int y = 1; y < tableSize + 1; y++) {
+                int temp = i*y;
+                if(temp<10)
+                    result+="  "+temp+" |";
+                else if (temp<100)
+                    result+=" "+temp+" |";
+                else
+                    result+=""+temp+" |";
+            }
+            result+="\n";
+        }
+
+        return result;
     }
 
     public static String getSmallMultiplicationTable() {
-        return null;
+        return getMultiplicationTable(5);
     }
 
     public static String getLargeMultiplicationTable() {
-        return null;
+        return getMultiplicationTable(10);
     }
 }

java/src/main/java/io/zipcoder/microlabs/mastering_loops/TriangleUtilities.java

@@ -3,20 +3,32 @@
 public class TriangleUtilities {
 
     public static String getRow(int numberOfStars) {
-        return null;
+        String result = "";
+        for(int i = 1; i <= numberOfStars; i++){
+            result +='*';
+        }
+
+
+        return result;
     }
 
     public static String getTriangle(int numberOfRows) {
-        return null;
+
+        String temp = "";
+
+        for (int i = 1; i < numberOfRows;i++){
+            temp+= getRow(i)+'\n';
+        }
+        return temp;
     }
 
     // hmm
 
     public static String getSmallTriangle() {
-        return null;
+        return getTriangle(5);
     }
 
     public static String getLargeTriangle() {
-        return null;
+        return getTriangle(10);
     }
 }

java/src/test/java/io/zipcoder/microlabs/mastering_loops/NumberUtilitiesTest.java

@@ -184,7 +184,8 @@ public void testGetRange3C() {
     @Test
     public void testGetEvenNumbers() {
         // : Given
-        String expected = "5791113151719";
+
+        String expected = "681012141618";
         int start = 5;
         int stop = 20;
 
@@ -198,7 +199,7 @@ public void testGetEvenNumbers() {
     @Test
     public void testGetOddNumbers() {
         // : Given
-        String expected = "681012141618";
+        String expected = "5791113151719";
         int start = 5;
         int stop = 20;
         int step = 5;