First Commit

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

 
 public class NumberUtilities {
     public static String getEvenNumbers(int start, int stop) {
-        return null;
+        StringBuilder sb  = new StringBuilder();
+        for (int i = start; i < stop; i++) {
+            if (i % 2 == 0) {
+                sb.append(i).toString();
+            }
+        }
+        return sb.toString();
     }
 
 
     public static String getOddNumbers(int start, int stop) {
-        return null;
+        StringBuilder sb  = new StringBuilder();
+        for (int i = start; i < stop; i++) {
+            if (i % 2 != 0) {
+                sb.append(i).toString();
+            }
+        }
+        return sb.toString();
     }
 
 
     public static String getSquareNumbers(int start, int stop, int step) {
-        return null;
+
+        StringBuilder sb  = new StringBuilder();
+
+        for (int i = start; i < stop; i += step) {
+            sb.append((int) Math.pow(i, 2));
+            }
+
+            return sb.toString();
+
+
     }
 
 
     public static String getRange(int start, int stop, int step) {
-        return null;
+
+        StringBuilder sb  = new StringBuilder();
+
+        for (int i = start; i < stop; i += step) {
+            sb.append(i).toString();
+        }
+
+        return sb.toString();
+
     }
 
 
+
     public static String getExponentiations(int start, int stop, int step, int exponent) {
-        return null;
+        StringBuilder sb  = new StringBuilder();
+
+        for (int i = start; i < stop; i += step) {
+            sb.append((int) Math.pow(i, exponent));
+        }
+
+        return sb.toString();
+
     }
 }

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

 
 public class TableUtilities {
     public static String getSmallMultiplicationTable() {
-        return null;
+
+        StringBuilder builder = new StringBuilder();
+
+        for (int row = 1; row <= 5; row++) {
+            for(int col = 1; col <=5; col++) {
+                int table = row * col;
+                builder.append(String.format("%3d |", table));
+
+            }
+
+            builder.append("\n");
+
+        }
+
+        return builder.toString();
     }
 
     public static String getLargeMultiplicationTable() {
-        return null;
+
+        StringBuilder builder = new StringBuilder();
+
+        for (int row = 1; row <= 10; row++) {
+            for(int col = 1; col <=10; col++) {
+                int table = row * col;
+                builder.append(String.format("%3d |", table));
+
+            }
+
+            builder.append("\n");
+
+        }
+
+        return builder.toString();
     }
 
     public static String getMultiplicationTable(int tableSize) {
-        return null;
+
+        StringBuilder builder = new StringBuilder();
+
+        for (int row = 1; row <= tableSize; row++) {
+            for(int col = 1; col <= tableSize; col++) {
+                int table = row * col;
+                builder.append(String.format("%3d |", table));
+
+            }
+
+            builder.append("\n");
+
+        }
+
+        return builder.toString();
     }
 }

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

 public class TriangleUtilities {
 
     public static String getTriangle(int numberOfRows) {
-        return null;
+        StringBuilder builder = new StringBuilder();
+        for (int row = 1; row < numberOfRows; row++) {
+            for (int col = 0; col < row; col++) {
+                builder.append("*");
+            }
+            builder.append("\n");
+        }
+
+        return builder.toString();
+
     }
 
     public static String getRow(int numberOfStars) {
-        return null;
+        String asterisk = "";
+        for (int i = 0; i < numberOfStars; i++) {
+            asterisk += "*";
+        }
+        return asterisk;
     }
 
     public static String getSmallTriangle() {
-        return null;
+        StringBuilder builder = new StringBuilder();
+        for (int row = 1; row <= 4; row++) {
+            for (int col = 0; col < row; col++) {
+                builder.append("*");
+            }
+            builder.append("\n");
+        }
+
+        return builder.toString();
     }
 
     public static String getLargeTriangle() {
-        return null;
+        StringBuilder builder = new StringBuilder();
+        for (int row = 1; row <= 9; row++) {
+            for (int col = 0; col < row; col++) {
+                builder.append("*");
+            }
+            builder.append("\n");
+        }
+
+        return builder.toString();
     }
 }

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

     @Test
     public void testGetEvenNumbers() {
         // : Given
-        String expected = "5791113151719";
+        String expected = "681012141618";
         int start = 5;
         int stop = 20;
 
     @Test
     public void testGetOddNumbers() {
         // : Given
-        String expected = "681012141618";
+        String expected = "5791113151719";
         int start = 5;
         int stop = 20;
         int step = 5;