u4

U4/Assignment4.java

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+import java.util.Scanner;
+
+class Assignment4 {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("Type the message to be shortened");
+        String message = scanner.nextLine();
+        message = message.toLowerCase();
+
+        int vowelsRemoved = 0;
+        int repeatsRemoved = 0;
+        String alg1 = "";
+        String vowels = "aeiou";
+
+        for (int i = 0; i < message.length(); i++) {
+            String c = message.substring(i, i + 1);
+            boolean isVowel = vowels.contains(c);
+            boolean isAtStartOfWord =
+                (i == 0) || message.substring(i - 1, i).equals(" ");
+
+            if (isVowel && !isAtStartOfWord) {
+                vowelsRemoved++;
+            } else if (
+                !isVowel &&
+                i > 0 &&
+                !c.equals(" ") &&
+                c.equals(message.substring(i - 1, i))
+            ) {
+                repeatsRemoved++;
+            } else {
+                alg1 += c;
+            }
+        }
+
+        System.out.println("\nAlgorithm 1");
+        System.out.println("Vowels removed: " + vowelsRemoved);
+        System.out.println("Repeats removed: " + repeatsRemoved);
+        System.out.println("Algorithm 1 message: " + alg1);
+        System.out.println(
+            "Algorithm 1 characters saved: " +
+                (message.length() - alg1.length())
+        );
+
+        String alg2 = "";
+        int uniqueChars = 0;
+
+        for (int i = 0; i < message.length(); i++) {
+            String c = message.substring(i, i + 1);
+            if (c.equals(" ")) continue;
+
+            boolean alreadySeen = false;
+            for (int j = 0; j < i; j++) {
+                if (c.equals(message.substring(j, j + 1))) {
+                    alreadySeen = true;
+                    break;
+                }
+            }
+
+            if (!alreadySeen) {
+                uniqueChars++;
+                int count = 0;
+                for (int k = 0; k < message.length(); k++) {
+                    if (c.equals(message.substring(k, k + 1))) count++;
+                }
+                alg2 += count + c;
+            }
+        }
+
+        System.out.println("\nAlgorithm 2");
+        System.out.println("Unique characters found: " + uniqueChars);
+        System.out.println("Algorithm 2 message: " + alg2);
+        System.out.println(
+            "Algorithm 2 characters saved: " +
+                (message.length() - alg2.length())
+        );
+    }
+}

U4/L1.5/U4_L1_5_Activity_One.java

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+/* Lesson 1 1/2 Coding Activity Question 2 */
+
+import java.util.Scanner;
+
+public class U4_L1_5_Activity_Two {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        int n = scanner.nextInt();
+        int sum = 0;
+
+        for (int i = 1; i <= n; i++) {
+            sum += i;
+        }
+
+        System.out.println(sum);
+    }
+}

U4/L1.5/U4_L1_5_Activity_Two.java

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+/* Lesson 1 1/2 Coding Activity Question 2 */
+
+import java.util.Scanner;
+
+public class U4_L1_5_Activity_Two {
+
+    public static void main(String[] args) {
+        int n = 5;
+        int sum = 0;
+
+        for (int i = 1; i <= n; i++) {
+            sum += i;
+        }
+
+        System.out.println("Sum of first " + n + " positive integers: " + sum);
+    }
+}

U4/L1/U4_L1_Activity_One.java

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+/* Lesson 1 Coding Activity Question 1 */
+
+import java.util.Scanner;
+
+public class U4_L1_Activity_One {
+
+    public static void main(String[] args) {
+        Scanner scan = new Scanner(System.in);
+        int sum = 0;
+
+        System.out.println("Enter any numbers (Enter 5 to stop)");
+        int num = scan.nextInt();
+
+        while (num != 5) {
+            sum += num;
+            num = scan.nextInt();
+        }
+
+        System.out.println("Sum is " + sum);
+    }
+}

U4/L1/U4_L1_Activity_Three.java

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+/* Lesson 1 Coding Activity Question 3 */
+
+import java.util.Scanner;
+
+public class U4_L1_Activity_Three {
+
+    public static void main(String[] args) {
+        Scanner scan = new Scanner(System.in);
+        System.out.println("Input a word:");
+        String word = scan.nextLine();
+        String result = "";
+
+        int i = 0;
+        while (i + 1 < word.length()) {
+            result += word.substring(i, i + 2);
+            i += 3;
+        }
+        if (i < word.length()) {
+            result += word.substring(i, i + 1);
+        }
+
+        System.out.println(result);
+    }
+}

U4/L1/U4_L1_Activity_Two.java

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+/* Lesson 1 Coding Activity Question 2 */
+
+import java.util.Scanner;
+
+public class U4_L1_Activity_Two {
+
+    public static void main(String[] args) {
+        Scanner scan = new Scanner(System.in);
+        int largest = Integer.MIN_VALUE;
+
+        System.out.println("Enter the Scores:");
+        int score = scan.nextInt();
+
+        while (score != -1) {
+            if (score > largest) {
+                largest = score;
+            }
+            score = scan.nextInt();
+        }
+
+        System.out.println("\nThe largest score is " + largest);
+    }
+}

U4/L2/U4_L2_Activity_One.java

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+/* Lesson 2 Coding Activity Question 1 */
+
+import java.util.Scanner;
+
+public class U4_L2_Activity_One
+{
+  public static void main(String[] args)
+  {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("Enter two numbers:");
+        int a = scanner.nextInt();
+        int b = scanner.nextInt();
+
+        int i = a;
+        while (i <= b) {
+            if (i % 2 != 0) {
+                System.out.print(i + " ");
+            }
+            i++;
+        }
+    }
+}

U4/L2/U4_L2_Activity_Three.java

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+/* Lesson 2 Coding Activity Question 3 */
+
+import java.util.Scanner;
+
+public class U4_L2_Activity_Three {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        double maxLat = -90;
+        double minLat = 90;
+        double maxLon = -180;
+        double minLon = 180;
+
+        int continueInput = 1;
+
+        while (continueInput == 1) {
+            System.out.println("Please enter the longitude:");
+            double lon = scanner.nextDouble();
+
+            System.out.println("Please enter the latitude:");
+            double lat = scanner.nextDouble();
+
+            if (lat < -90 || lat > 90 || lon < -180 || lon > 180) {
+                System.out.println("Incorrect Latitude or Longitude");
+            } else {
+                if (lat > maxLat) maxLat = lat;
+                if (lat < minLat) minLat = lat;
+                if (lon > maxLon) maxLon = lon;
+                if (lon < minLon) minLon = lon;
+            }
+
+            System.out.println("Would you like to enter another location?");
+            continueInput = scanner.nextInt();
+        }
+
+        System.out.println("Farthest North: " + maxLat);
+        System.out.println("Farthest South: " + minLat);
+        System.out.println("Farthest East: " + maxLon);
+        System.out.println("Farthest West: " + minLon);
+
+        scanner.close();
+    }
+}

U4/L2/U4_L2_Activity_Two.java

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+/* Lesson 2 Coding Activity Question 2 */
+
+import java.util.Scanner;
+
+public class U4_L2_Activity_Two {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.println("Enter a positive integer:");
+        int n = scanner.nextInt();
+
+        int place = 1;
+        while (n > 0) {
+            int digit = n % 10;
+            System.out.println(digit * place);
+            place *= 10;
+            n /= 10;
+        }
+    }
+}

U4/L3/U4_L3_Activity_Four.java

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+/* Lesson 3 Coding Activity Question 4 */
+
+import java.util.Scanner;
+
+public class U4_L3_Activity_Four {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Enter a positive integer:");
+        int num = scanner.nextInt();
+
+        if (num <= 0) {
+            System.out.println("error");
+        } else {
+            int start = num - (num % 3);
+            for (int i = start; i >= 0; i -= 3) {
+                System.out.print(i + " ");
+            }
+            System.out.println();
+        }
+    }
+}

U4/L3/U4_L3_Activity_One.java

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+/* Lesson 3 Coding Activity Question 1 */
+
+import java.util.Scanner;
+
+public class U4_L3_Activity_One {
+
+    public static void main(String[] args) {
+        for (int i = 1; i <= 25; i += 2) {
+            System.out.println(i);
+        }
+    }
+}

U4/L3/U4_L3_Activity_Three.java

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+/* Lesson 3 Coding Activity Question 3 */
+
+import java.util.Scanner;
+
+public class U4_L3_Activity_Three {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Enter a number between 0 and 50:");
+        int num = scanner.nextInt();
+
+        if (num <= 0 || num >= 50) {
+            System.out.println("error");
+        } else {
+            for (int i = num; i <= 50; i++) {
+                System.out.print(i);
+                if (i == 50) {
+                    System.out.println();
+                } else if ((i - num) % 5 == 4) {
+                    System.out.println();
+                } else {
+                    System.out.print(" ");
+                }
+            }
+        }
+    }
+}

U4/L3/U4_L3_Activity_Two.java

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+/* Lesson 3 Coding Activity Question 2 */
+
+import java.util.Scanner;
+
+public class U4_L3_Activity_Two {
+
+    public static void main(String[] args) {
+        for (int i = 17; i <= 73; i++) {
+            System.out.print(i);
+            if (i == 73) {
+                System.out.println();
+            } else if ((i - 17) % 10 == 9) {
+                System.out.println();
+            } else {
+                System.out.print(" ");
+            }
+        }
+    }
+}

U4/L4/U4_L4_Activity_One.java

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+/* Lesson 4 Coding Activity Question 1 */
+
+import java.util.Scanner;
+
+public class U4_L4_Activity_One {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Input String:");
+        String input = scanner.nextLine();
+        String lower = input.toLowerCase();
+
+        int count = 0;
+        for (int i = 0; i < lower.length() - 1; i++) {
+            if (lower.charAt(i) == 'p') {
+                char next = lower.charAt(i + 1);
+                if (
+                    next == 'a' ||
+                    next == 'e' ||
+                    next == 'i' ||
+                    next == 'o' ||
+                    next == 'u'
+                ) {
+                    count++;
+                }
+            }
+        }
+
+        System.out.println(
+            "Contains p followed by a vowel " + count + " times."
+        );
+    }
+}

U4/L4/U4_L4_Activity_Three.java

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+/* Lesson 4 Coding Activity Question 3 */
+
+import java.util.Scanner;
+
+public class U4_L4_Activity_Three {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Enter two strings:");
+        String first = scanner.nextLine();
+        String second = scanner.nextLine();
+
+        if (first.length() != second.length()) {
+            System.out.println("error");
+        } else {
+            String result = "";
+            for (int i = first.length() - 1; i >= 0; i--) {
+                result += second.charAt(i);
+                result += first.charAt(i);
+            }
+            System.out.println(result);
+        }
+    }
+}

U4/L4/U4_L4_Activity_Two.java

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+/* Lesson 4 Coding Activity Question 2 */
+
+import java.util.Scanner;
+
+public class U4_L4_Activity_Two {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Enter a string:");
+        String input = scanner.nextLine();
+        String lower = input.toLowerCase();
+
+        String result = "";
+        for (int i = 0; i < lower.length(); i++) {
+            char c = lower.charAt(i);
+            if (c != 'e' && c != 't' && c != 'a' && c != 'i' && c != 'o') {
+                result += c;
+            }
+        }
+
+        System.out.println(result);
+    }
+}

U4/L5/U4_L5_Activity_One.java

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+/* Lesson 5 Coding Activity Question 1 */
+
+import java.util.Scanner;
+
+public class U4_L5_Activity_One {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Input a String:");
+        String input = scanner.nextLine();
+
+        System.out.println("Input an integer:");
+        int n = scanner.nextInt();
+
+        String result = "";
+        for (int i = 0; i < input.length(); i++) {
+            for (int j = 0; j < n; j++) {
+                result += input.charAt(i);
+            }
+        }
+
+        System.out.println(result);
+    }
+}

U4/L5/U4_L5_Activity_Two.java

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+/* Lesson 5 Coding Activity Question 2 */
+
+import java.util.Scanner;
+
+public class U4_L5_Activity_Two {
+
+    public static void main(String[] args) {
+        for (int i = 10; i >= 1; i--) {
+            for (int j = 0; j < i; j++) {
+                System.out.print(i + " ");
+            }
+            System.out.println();
+        }
+    }
+}