feat: add PCA1 Suggestions

PCA1_Suggestions_Solved/AddNumbers.java

@@ -0,0 +1,14 @@
+import java.util.Scanner;
+
+public class AddNumbers {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter the first number: ");
+        int first = scanner.nextInt();
+        System.out.print("Enter the second number: ");
+        int second = scanner.nextInt();
+
+        System.out.println("Sum: " + (first + second));
+        scanner.close();
+    }
+}

PCA1_Suggestions_Solved/Armstrong.java

@@ -0,0 +1,25 @@
+import java.util.Scanner;
+
+public class Armstrong {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter a number: ");
+        int number = scanner.nextInt();
+        int original = number;
+        int digits = String.valueOf(Math.abs(number)).length();
+        int sum = 0;
+
+        while (number != 0) {
+            int digit = Math.abs(number % 10);
+            sum += (int) Math.pow(digit, digits);
+            number /= 10;
+        }
+
+        if (sum == original) {
+            System.out.println(original + " is an Armstrong number.");
+        } else {
+            System.out.println(original + " is not an Armstrong number.");
+        }
+        scanner.close();
+    }
+}

PCA1_Suggestions_Solved/EmployeeDetails.java

@@ -0,0 +1,30 @@
+import java.util.Scanner;
+
+public class EmployeeDetails {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter employee name: ");
+        String name = scanner.nextLine();
+        System.out.print("Enter employee code: ");
+        String code = scanner.nextLine();
+        System.out.print("Enter employee salary: ");
+        double salary = scanner.nextDouble();
+        scanner.nextLine();
+        System.out.print("Enter employee address: ");
+        String address = scanner.nextLine();
+        System.out.print("Enter employee age: ");
+        int age = scanner.nextInt();
+        scanner.nextLine();
+        System.out.print("Enter employee gender: ");
+        String gender = scanner.nextLine();
+
+        System.out.println("\nEmployee Details");
+        System.out.println("Name: " + name);
+        System.out.println("Code: " + code);
+        System.out.println("Salary: " + salary);
+        System.out.println("Address: " + address);
+        System.out.println("Age: " + age);
+        System.out.println("Gender: " + gender);
+        scanner.close();
+    }
+}

PCA1_Suggestions_Solved/Factorial.java

@@ -0,0 +1,17 @@
+import java.util.Scanner;
+
+public class Factorial {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter a non-negative integer: ");
+        int number = scanner.nextInt();
+        long factorial = 1;
+
+        for (int i = 2; i <= number; i++) {
+            factorial *= i;
+        }
+
+        System.out.println("Factorial: " + factorial);
+        scanner.close();
+    }
+}

PCA1_Suggestions_Solved/FibonacciSum.java

@@ -0,0 +1,23 @@
+import java.util.Scanner;
+
+public class FibonacciSum {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter the number of terms: ");
+        int n = scanner.nextInt();
+
+        long first = 0;
+        long second = 1;
+        long sum = 0;
+
+        for (int i = 0; i < n; i++) {
+            sum += first;
+            long next = first + second;
+            first = second;
+            second = next;
+        }
+
+        System.out.println("Sum of Fibonacci series: " + sum);
+        scanner.close();
+    }
+}

PCA1_Suggestions_Solved/GreaterNumber.java

@@ -0,0 +1,21 @@
+import java.util.Scanner;
+
+public class GreaterNumber {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter the first number: ");
+        int first = scanner.nextInt();
+        System.out.print("Enter the second number: ");
+        int second = scanner.nextInt();
+
+        if (first > second) {
+            System.out.println(first + " is greater.");
+        } else if (second > first) {
+            System.out.println(second + " is greater.");
+        } else {
+            System.out.println("Both numbers are equal.");
+        }
+
+        scanner.close();
+    }
+}

PCA1_Suggestions_Solved/LCM.java

@@ -0,0 +1,26 @@
+import java.util.Scanner;
+
+public class LCM {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter the first number: ");
+        int first = scanner.nextInt();
+        System.out.print("Enter the second number: ");
+        int second = scanner.nextInt();
+
+        int firstValue = Math.abs(first);
+        int secondValue = Math.abs(second);
+        int a = firstValue;
+        int b = secondValue;
+
+        while (b != 0) {
+            int remainder = a % b;
+            a = b;
+            b = remainder;
+        }
+
+        int lcm = (firstValue == 0 || secondValue == 0) ? 0 : (firstValue / a) * secondValue;
+        System.out.println("LCM: " + lcm);
+        scanner.close();
+    }
+}

PCA1_Suggestions_Solved/MonthSwitch.java

@@ -0,0 +1,54 @@
+import java.util.Scanner;
+
+public class MonthSwitch {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter a month number (1-12): ");
+        int month = scanner.nextInt();
+
+        String monthName;
+        switch (month) {
+            case 1:
+                monthName = "January";
+                break;
+            case 2:
+                monthName = "February";
+                break;
+            case 3:
+                monthName = "March";
+                break;
+            case 4:
+                monthName = "April";
+                break;
+            case 5:
+                monthName = "May";
+                break;
+            case 6:
+                monthName = "June";
+                break;
+            case 7:
+                monthName = "July";
+                break;
+            case 8:
+                monthName = "August";
+                break;
+            case 9:
+                monthName = "September";
+                break;
+            case 10:
+                monthName = "October";
+                break;
+            case 11:
+                monthName = "November";
+                break;
+            case 12:
+                monthName = "December";
+                break;
+            default:
+                monthName = "Invalid month number";
+        }
+
+        System.out.println(monthName);
+        scanner.close();
+    }
+}

PCA1_Suggestions_Solved/OddEven.java

@@ -0,0 +1,17 @@
+import java.util.Scanner;
+
+public class OddEven {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter a number: ");
+        int number = scanner.nextInt();
+
+        if (number % 2 == 0) {
+            System.out.println(number + " is even.");
+        } else {
+            System.out.println(number + " is odd.");
+        }
+
+        scanner.close();
+    }
+}

PCA1_Suggestions_Solved/PrimeNumbers.java

@@ -0,0 +1,25 @@
+import java.util.Scanner;
+
+public class PrimeNumbers {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter the upper limit: ");
+        int limit = scanner.nextInt();
+
+        System.out.println("Prime numbers from 1 to " + limit + ":");
+        for (int number = 2; number <= limit; number++) {
+            boolean isPrime = true;
+            for (int divisor = 2; divisor * divisor <= number; divisor++) {
+                if (number % divisor == 0) {
+                    isPrime = false;
+                    break;
+                }
+            }
+            if (isPrime) {
+                System.out.print(number + " ");
+            }
+        }
+        System.out.println();
+        scanner.close();
+    }
+}

PCA1_Suggestions_Solved/SwapWithThirdVariable.java

@@ -0,0 +1,18 @@
+import java.util.Scanner;
+
+public class SwapWithThirdVariable {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter the first number: ");
+        int first = scanner.nextInt();
+        System.out.print("Enter the second number: ");
+        int second = scanner.nextInt();
+
+        int temporary = first;
+        first = second;
+        second = temporary;
+
+        System.out.println("After swapping: first = " + first + ", second = " + second);
+        scanner.close();
+    }
+}

PCA1_Suggestions_Solved/SwapWithoutThirdVariable.java

@@ -0,0 +1,18 @@
+import java.util.Scanner;
+
+public class SwapWithoutThirdVariable {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        System.out.print("Enter the first number: ");
+        int first = scanner.nextInt();
+        System.out.print("Enter the second number: ");
+        int second = scanner.nextInt();
+
+        first = first ^ second;
+        second = first ^ second;
+        first = first ^ second;
+
+        System.out.println("After swapping: first = " + first + ", second = " + second);
+        scanner.close();
+    }
+}