Looping.....

Looping1

import java.util.Scanner;

public class Looping

{

public static void main (String [] args)

{

Scanner s= new Scanner(System.in);

System.out.print("Masukan n: ");

int n=s.nextInt();

for(int i=1; i<=n; i++)

{

for(int j=1; j<=n-(i-1); j++)

{

System.out.print("*");

}

System.out.print("\n");

}

for (int a=1; a<=n-1; a++)

{

for (int b=n-a; b<=n; b++)

{

System.out.print("*");

}

System.out.print("\n");

}

}

}

Looping2

import java.util.Scanner;

public class Looping2

{

public static void main (String [] args)

{

Scanner s= new Scanner(System.in);

System.out.print("Masukan n: ");

int n=s.nextInt();

for(int i=1; i<=n; i++)

{

for(int j=1; j<=n-(i-1); j++)

{

System.out.print(" ");

}

for(int k=1; k<=(i*2)-1; k++)

{

if(i==n && k==n)

{

System.out.print("+");

}

else 

{

System.out.print("*");

}

}

System.out.print("\n");

}

for(int a=1; a<=n; a++)

{

for(int b=n-a; b<=n; b++)

{

System.out.print(" ");

}

for (int c=(2*a)-1; c<=2*n-3; c++)

{

System.out.print("*");

}

System.out.print("\n");

}

}

}

Looping 3

import java.util.Scanner;

public class Looping3

{

public static void main(String [] args)

{

Scanner s=new Scanner(System.in);

System.out.print("Masukan Angka: ");

int angka=s.nextInt();

int i=1;

do 

{

angka=angka/10;

i++;

}

while (angka>0);

System.out.println(i-1);

}

}