complete lab on loops

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

@@ -1,28 +1,58 @@
 package io.zipcoder.microlabs.mastering_loops;
-
+import java.util.*;
 
 public class NumberUtilities {
     public static String getEvenNumbers(int start, int stop) {
-        return null;
+        StringBuilder result = new StringBuilder();
+        for(int i=start;i<stop;i++){
+            if(i%2==0){
+                result.append(i);
+            }
+        }
+
+        return result.toString();
     }
 
 
     public static String getOddNumbers(int start, int stop) {
-        return null;
+        StringBuilder result = new StringBuilder();
+        for(int i=start;i<stop;i++){
+            if(i%2!=0){
+                result.append(i);
+            }
+        }
+
+        return result.toString();
     }
 
 
     public static String getSquareNumbers(int start, int stop, int step) {
-        return null;
+        StringBuilder result = new StringBuilder();
+        for(int i=start;i<stop;i+=step){
+            result.append((int)Math.pow(i,2));
+        }
+
+        return result.toString();
+
     }
 
 
     public static String getRange(int start, int stop, int step) {
-        return null;
+        StringBuilder result = new StringBuilder();
+        for(int i=start;i<stop;i+=step){
+            result.append(i);
+        }
+
+        return result.toString();
     }
 
 
     public static String getExponentiations(int start, int stop, int step, int exponent) {
-        return null;
+        StringBuilder result = new StringBuilder();
+        for(int i=start;i<stop;i+=step){
+            result.append((int)Math.pow(i,exponent));
+        }
+
+        return result.toString();
     }
 }

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

@@ -1,15 +1,52 @@
 package io.zipcoder.microlabs.mastering_loops;
 
+import java.lang.reflect.Array;
+import java.util.*;
+
 public class TableUtilities {
     public static String getSmallMultiplicationTable() {
-        return null;
+        StringBuilder smallMultiplicationTable = new StringBuilder();
+        for(int i = 1;i<=5;i++){
+            for(int j=1;j<=5;j++){
+                int num=i*j;
+                smallMultiplicationTable.append(String.format("%3d |",num));
+            }smallMultiplicationTable.append("\n");
+
+        }
+
+
+        String myTable = smallMultiplicationTable.toString();
+        return myTable;
     }
 
     public static String getLargeMultiplicationTable() {
-        return null;
+        StringBuilder smallMultiplicationTable = new StringBuilder();
+        for(int i = 1;i<=10;i++){
+            for(int j=1;j<=10;j++){
+                int num=i*j;
+                smallMultiplicationTable.append(String.format("%3d |",num));
+            }smallMultiplicationTable.append("\n");
+
+        }
+
+
+        String myTable = smallMultiplicationTable.toString();
+        return myTable;
+
     }
 
     public static String getMultiplicationTable(int tableSize) {
-        return null;
+        StringBuilder smallMultiplicationTable = new StringBuilder();
+        for(int i = 1;i<=tableSize;i++){
+            for(int j=1;j<=tableSize;j++){
+                int num=i*j;
+                smallMultiplicationTable.append(String.format("%3d |",num));
+            }smallMultiplicationTable.append("\n");
+
+        }
+
+
+        String myTable = smallMultiplicationTable.toString();
+        return myTable;
     }
 }

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

@@ -3,18 +3,50 @@
 public class TriangleUtilities {
 
     public static String getTriangle(int numberOfRows) {
-        return null;
+        String myTriangle = "";
+        for (int i = 1; i <numberOfRows; i++) {
+            for (int j = 0; j < i; j++) {
+                myTriangle += "*";
+            }
+            myTriangle += "\n";
+        }
+        return myTriangle;
     }
 
     public static String getRow(int numberOfStars) {
-        return null;
+        /*StringBuilder myTriangle = new StringBuilder();
+        for(int i=0;i<numberOfStars;i++){
+            myTriangle.append('*');
+        }
+        String myStrTriangle = myTriangle.toString();
+        return myStrTriangle;*/
+        String myRow = "";
+        for (int i = 0; i < numberOfStars; i++) {
+            myRow += "*";
+        }
+        return myRow;
     }
 
     public static String getSmallTriangle() {
-        return null;
+        String mySmallTriangle = "";
+        for (int i = 1; i <= 4; i++) {
+            for (int j = 0; j < i; j++) {
+                mySmallTriangle += "*";
+            }
+            mySmallTriangle += "\n";
+        }
+        return mySmallTriangle;
     }
 
+
     public static String getLargeTriangle() {
-        return null;
+        String myLargeTriangle = "";
+        for (int i = 1; i <= 9; i++) {
+            for (int j = 0; j < i; j++) {
+                myLargeTriangle += "*";
+            }
+            myLargeTriangle += "\n";
+        }
+        return myLargeTriangle;
     }
 }

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;