all the records

public static void main(String[] args) {
		for (int i = 2; i <= 9; i++) {
			//i는 앞의 숫자, j는 뒤의 숫자, i*j는 결과값
			for (int j = 1; j <= 9; j++) {
				System.out.printf("%dx%d=%d\t", i, j, i * j);
			}
			System.out.printf("\n");
		}
	}

public class DiceGame {
	public static void main(String[] args) {
		System.out.println("type number between 1 to 6");
		Scanner sc = new Scanner (System.in);
		int userNum = sc.nextInt();
		
		Random rd = new Random();
							//0~5까지 이지만 +1해서 6까지 나옴
		int num = rd.nextInt(6)+1;
		System.out.println(num);
		

		String result =
		userNum > num ? "user win" : 
		(userNum <num ? "ai win" : "Draw") ;
		System.out.println("user: " + userNum + " ai: "+ num);
		System.out.println(result);
		
		sc.close();
	}
}

ex1

Scanner sc = new Scanner(System.in);
		System.out.println("Type One Alphabet");
		char a = sc.next().charAt(0);
		
		
		char result=
 		(a>=65 && a<=90) ? ((char)(a + 32)) : ((char)(a - 32));
			System.out.println(result);
		
		
	sc.close();

ex2

Scanner sc = new Scanner(System.in);
		System.out.println("Type One Alphabet");
		char a = sc.next().charAt(0);
		
		String result = 
		(a>=65 && a<=90) ?  "Upper Case" : "Lower Case";
		System.out.println(result);
		
	sc.close();

Scanner sc = new Scanner(System.in);
		System.out.println("1부터 99중에서 하나의 수를 입력해주세요");
		int num = sc.nextInt();

		
			int tenth = num / 10;
			int first = num - (tenth * 10);
			
			/*num    6    13   69
			  tenth  0    1    6
			  		  ㄴ0.6 / 1.3 / 6.9 이지만 실수만 표시
			  first  6    3    9
			*/

			
			
			if (num < 10) {
				if (first % 3 == 0)//나누기 3했을떄 남는 수가 0과 같다
					System.out.println("박수짝");
			}

			else if (num > 10) {
				if (tenth % 3 == 0) {
					if (first % 3 != 0)
						System.out.println("박수짝");
					if (first % 3 == 0)
						System.out.println("박수짝짝");
				}

				else if (first % 3 == 0)
					System.out.println("박수짝");
			}

			sc.close();

	System.out.println("금액을 입력해주세요.");
		Scanner sc =  new Scanner (System.in);
		int money=sc.nextInt();
		
		int a = money/50000;//몫이 a 오만원권 장수가 됨. 
		money = money%50000;//<- 오만원권을 뺸 나머지 머니
		System.out.println("오만원권 " + a + "매");
		
		int b = money/10000;//<-위에서 내려온 나머지머니를 나눠서 몫이 b 만원권 장수가 됨.
		money = money%10000;
		System.out.println("만원권 " + b + "매");
		
		int c = money/5000;
		money = money%5000;
		System.out.println("오천원권 " + c +"매");
		
		int d = money/1000;
		money = money%1000;
		System.out.println("천원권 " + d +"매");
		
		int e = money/500;
		money = money%500;
		System.out.println("오백원 " + e +"개");
		
		int f = money/100;
		money = money%100;
		System.out.println("백원 " + f +"개");
		
		int g = money/50;
		money = money%50;
		System.out.println("오십원 " + g + "개");
		
		int h = money/10;
		money = money%10;
		System.out.println("십원 " + h + "개");
		
		
		sc.close();