Data-Structure/loop.java at main · mrinal-27/Data-Structure · GitHub

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import java.util.*;

public class loop {
    public static void main (String args[]){
        Scanner sc=new Scanner(System.in);
        int num=sc.nextInt();
        System.out.println(num);
        for(int i=1;i<=5;i++){
            System.out.println("hello world");
        }
        for(int i=1;i<=10;i++){
            System.out.println(num*i);
        }
        for (int i=1;i<=4;i++){
            for (int j=1;j<=5;j++){
                System.out.print("*");
            }
        System.out.println(" ");
        }
        for (int i=1;i<=4;i++){
            for (int j=1;j<=5;j++){
                if(i==1 || j==1 || i==4 || j==5){
                    System.out.print("*");
                }
                else{
                    System.out.print(" ");
                }
            }
        System.out.println(" ");
        }
        for (int i=1; i<=4; i++){
            for (int j=1; j<=i; j++){
                System.out.print("*");
            }
            System.out.println(" ");
        }
        for (int i=1; i<=4; i++){
            for (int j=4; j>=i; j--){
                System.out.print("*");
            }
            System.out.println(" ");
        }
    }

}