NTT Totally Done

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

@@ -3,26 +3,50 @@
 
 public class NumberUtilities {
     public static String getEvenNumbers(int start, int stop) {
-        return null;
+        String evens = "";
+        for(int i = start; i < stop; i++) {
+            if(i % 2 == 0) {
+                evens += Integer.toString(i);
+            }
+        }
+        return evens;
     }
 
 
     public static String getOddNumbers(int start, int stop) {
-        return null;
+        String odds = "";
+        for(int i = start; i < stop; i++) {
+            if(i % 2 != 0) {
+                odds += Integer.toString(i);
+            }
+        }
+        return odds;
     }
 
 
     public static String getSquareNumbers(int start, int stop, int step) {
-        return null;
+        String squares = "";
+        for(int i = start; i < stop; i+=step) {
+                squares += Integer.toString(i*i);
+        }
+        return squares;
     }
 
 
     public static String getRange(int start, int stop, int step) {
-        return null;
+        String range = "";
+        for(int i = start; i < stop; i+=step) {
+            range += Integer.toString(i);
+        }
+        return range;
     }
 
 
     public static String getExponentiations(int start, int stop, int step, int exponent) {
-        return null;
+        String expo = "";
+        for(int i = start; i < stop; i+=step) {
+            expo += (int) Math.pow(i, exponent);
+        }
+        return expo;
     }
 }

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

@@ -2,14 +2,38 @@
 
 public class TableUtilities {
     public static String getSmallMultiplicationTable() {
-        return null;
+        StringBuilder smallMult = new StringBuilder();
+        for (int row = 1; row <= 5; row++) {
+            for (int col = 1; col <= 5; col++) {
+                int colRow = col * row;
+                smallMult.append(String.format("%3d |", colRow));
+            }
+            smallMult.append("\n");
+        }
+        return smallMult.toString();
     }
 
     public static String getLargeMultiplicationTable() {
-        return null;
+        StringBuilder largeMult = new StringBuilder();
+        for (int row = 1; row <= 10; row++) {
+            for (int col = 1; col <= 10; col++) {
+                int colRow = col * row;
+                largeMult.append(String.format("%3d |", colRow));
+            }
+            largeMult.append("\n");
+        }
+        return largeMult.toString();
     }
 
     public static String getMultiplicationTable(int tableSize) {
-        return null;
+        StringBuilder multTab = new StringBuilder();
+        for (int row = 1; row <= tableSize; row++) {
+            for (int col = 1; col <= tableSize; col++) {
+                int colRow = col * row;
+                multTab.append(String.format("%3d |", colRow));
+            }
+            multTab.append("\n");
+        }
+        return multTab.toString();
     }
 }

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

@@ -3,18 +3,44 @@
 public class TriangleUtilities {
 
     public static String getTriangle(int numberOfRows) {
-        return null;
+        StringBuilder newTri = new StringBuilder();
+
+        for(int row=1; row < numberOfRows; row++) {
+            for(int col=0; col < row; col++) {
+                newTri.append("*");
+            }
+            newTri.append("\n");
+        }
+        return newTri.toString();
     }
 
     public static String getRow(int numberOfStars) {
-        return null;
+        StringBuilder newRow = new StringBuilder();
+        for(int i=0; i < numberOfStars; i++) {
+            newRow.append("*");
+        }
+        return newRow.toString();
     }
 
     public static String getSmallTriangle() {
-        return null;
+        StringBuilder smallTri = new StringBuilder();
+        for(int row=1; row < 5; row++) {
+            for(int col=0; col < row; col++) {
+                smallTri.append("*");
+            }
+            smallTri.append("\n");
+        }
+        return smallTri.toString();
     }
 
     public static String getLargeTriangle() {
-        return null;
+        StringBuilder getTri = new StringBuilder();
+        for(int row=1; row < 10; row++) {
+            for(int col=0; col < row; col++) {
+                getTri.append("*");
+            }
+            getTri.append("\n");
+        }
+        return getTri.toString();
     }
 }

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

@@ -51,7 +51,7 @@ public void testGetRange2() {
     @Test
     public void testGetEvenNumbers() {
         // : Given
-        String expected = "5791113151719";
+        String expected = "681012141618";
         int start = 5;
         int stop = 20;
 
@@ -65,7 +65,7 @@ public void testGetEvenNumbers() {
     @Test
     public void testGetOddNumbers() {
         // : Given
-        String expected = "681012141618";
+        String expected = "5791113151719";
         int start = 5;
         int stop = 20;
         int step = 5;