Finished Ch. 15 Program Challenges

Author: Thesnowmanndev

Java Programming Principles 2/Homework/4. Unit Four/3. Ch 15 Program Challenges/1. Recursive Multiplication/src/RecursiveMultiplication.java

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+/*
+ * This program was written by Kyle Martin on 7/31/2021 for Java Programming Principles 2 during Summer Session 2
+ * at Southwestern College, Kansas.
+ *
+ * IMPORTANT: Normally I would not place a bunch of comments in my code describing what my code is doing as I like to
+ * have code that is written in a manner to be understandable while reading it. Though, do to the grading rubric I will
+ * explain my code.
+ *
+ * This program was created to perform multiplication of two given integers using recursion
+ * See Chapter 15 Programming Challenges  - Challenge One.
+ */
+import java.util.Scanner;
+
+public class RecursiveMultiplication {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        int x, y;
+        System.out.println("Enter the first number:");
+        x = scanner.nextInt();
+        System.out.println("Enter the second number:");
+        y = scanner.nextInt();
+
+        int result = multiplication (x, y);
+
+        System.out.println(x + " times " + y + " is " + result);
+        scanner.close();
+    }
+
+    private static int multiplication(int x, int y) {
+        if (y != 0) {
+            return (x + multiplication(x, y-1));
+        } else {
+            return 0;
+        }
+    }
+}

Java Programming Principles 2/Homework/4. Unit Four/3. Ch 15 Program Challenges/1. Recursive Multiplication/src/output.jpg

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+/*
+ * This program was written by Kyle Martin on 7/31/2021 for Java Programming Principles 2 during Summer Session 2
+ * at Southwestern College, Kansas.
+ *
+ * IMPORTANT: Normally I would not place a bunch of comments in my code describing what my code is doing as I like to
+ * have code that is written in a manner to be understandable while reading it. Though, do to the grading rubric I will
+ * explain my code.
+ *
+ * This program was created to use recursive to print a string in reverse
+ * See Chapter 15 Programming Challenges  - Challenge Three.
+ */
+public class StringReverser {
+    public static void main(String[] args) {
+        String string =  "This is a string.";
+        System.out.println("String in normal sequence: " + string);
+        System.out.println("String in reverse sequence: ");
+        reverseString(string,(string.length()-1));
+    }
+
+    private static void reverseString(String string, int i) {
+        if (i >= 0) {
+            System.out.print(string.charAt(i));
+            reverseString(string, i - 1);
+        }
+    }
+}