import java.util.Random;
        
        public class NewArray {
            public static void main(String[] args) {
                int[] array = {1, 2, 3, 4, 5, 6, 7};
                shuffleArray(array);
        
                System.out.println("Shuffled Array:");
                for (int element : array) {
                    System.out.print(element + " ");
                }
            }
        
            public static void shuffleArray(int[] array) {
                Random rand = new Random();
                // using swapping of two numbers method can do this problem 
                for (int i = array.length - 1; i > 0; i--) {
                    int j = rand.nextInt(i + 1);
                    int temp = array[i];
                    array[i] = array[j];
                    array[j] = temp;
                }
            }
        }
        
                                
                            

                                
                import java.util.Scanner;
                public class Pangram {
                public static void main(String[] args) {
                Scanner scanner = new Scanner(System.in);
                                    
                                    
                System.out.println("Pangram Checker");
                System.out.print("Enter a sentence: ");
                String input = scanner.nextLine();
                scanner.close();
                                    
                                    
                boolean isPangram = checkPangram(input);
                if (isPangram) {
                    System.out.println("It's a pangram!");
                } else {
                    System.out.println("It's not a pangram.");
                    }
                }
                public static boolean checkPangram(String input) {
                input = input.toLowerCase();
                String alphabet = "abcdefghijklmnopqrstuvwxyz";
                int alphabetLength = alphabet.length();
                                    
                for (int i = 0; i < alphabetLength; i++) {
                char letter = alphabet.charAt(i);
                if (!input.contains(String.valueOf(letter))) {
                    return false; 
                }
                }
                return true; 
                                        
                    }
                }
                /* 
                THis program takes input and checks for every letter of 
                english aplhabet if it is present in the input then 
                it is pangram or else false
                  */
                                    
                                
                            

                            
                import java.util.Scanner;
                
                public class IntegerV {
                public static int rToI(String s) {
                int result = 0;
                int PV = 0;
                
                for (int i = s.length() - 1; i >= 0; i--) {
                    char currentChar = s.charAt(i);
                    int CV = 0;
                
                    if (currentChar == 'I') {
                        CV = 1;
                    } else if (currentChar == 'V') {
                        CV = 5;
                    } else if (currentChar == 'X') {
                        CV = 10;
                    } else if (currentChar == 'L') {
                        CV = 50;
                    } else if (currentChar == 'C') {
                        CV = 100;
                    } else if (currentChar == 'D') {
                        CV = 500;
                    } else if (currentChar == 'M') {
                        CV = 1000;
                    }
                
                    if (CV < PV) {
                        result -= CV;
                    } else {
                        result += CV;
                    }
                
                    PV = CV;
                }
                
                return result;
                }
                
                public static void main(String[] args) {
                Scanner scanner = new Scanner(System.in);
                System.out.print("Enter a Roman number: ");
                String romanNumber = scanner.nextLine();
                
                int integer = rToI(romanNumber);
                System.out.println(romanNumber + " = " + integer);
                
                scanner.close();
                }
                }