Program3_5

      import java.util.*;
public class Program3_5
{
	public static void main(String[] args)
	{
		Scanner scan = new Scanner(System.in);
		String s;
		
		System.out.print("Enter a string: ");
		s = scan.next();
		
		for(int i = 0; i < s.length(); i++)
			System.out.println(s.charAt(i));
	}
}

ForLoopExample

      public class ForLoopExample
{
	public static void main(String[] args)
	{
	for(int num = 1; num <= 10; num++)
			System.out.println(num);
	}
}

WhileExample2

      public class WhileExample2
{
	public static void main(String[] args)
	{
		int num = 1;
		while(num <= 10)
		{
			System.out.println(num);
			num++;	
		}
	}
}

WhileExample

      import java.util.*;
public class WhileExample
{
	public static void main(String[] args)
	{
		String response = "y";
		
		Scanner scan = new Scanner(System.in);
		
		while (response.equalsIgnoreCase("y"))
		{
			//code goes here
		
			System.out.print("Again? (y/n): ");
			response = scan.next();
		
		}
	}
}