Finish the code to work with Strings

/*
* Term 1: Lesson 22 Coding Activity 1
* Write the code to take a String and print it with one letter per line.
*
* Sample run:
* Enter a string: bought
* b
* o
* u
* g
* h
* t
*
*/
import java.util.Scanner;
import java.lang.Math;
class Lesson_22_Activity_One
{
  public static void main(String[] args)
  {
  //Declare a Scanner and prompt the use for a String.
  Scanner scan = new Scanner(System.in);
  System.out.println("Enter a string:");
  // read in the String
  String h = 
  //Loop through the String, printing each character.






 }
}