Menubased Program in JAVA : Syntax Help

Write a program (WAP) in JAVA to Menu-based selection for know the syntax of While, do...while and for loop.

/* Java Program - Java do-while Loop
* Using a do-while loop to process a menu selection
*/
import java.util.Scanner;
public class JavaHelp
{
public static void main(String args[])
{
    Scanner scan = new Scanner(System.in);
    char choice;

    do
    {
      System.out.println("Help on Syntax : ");
      System.out.println("1. while");
      System.out.println("2. do-while");
      System.out.println("3. for");
      System.out.println("4. QUIT");

      System.out.println("Choose any one : ");
      choice = scan.next().charAt(0);
    }while(choice < '1' || choice > '3');

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

    switch(choice)
    {
      case '1' :
      System.out.println("The while :\n");
      System.out.println("while(condition)\n{");
      System.out.println("\t// body of loop\n}");
      break;

      case '2' :
      System.out.println("The do-while :\n");
      System.out.println("do\n{");
      System.out.println("\t// body of loop\n\n}while(condition);");
      break;

      case '3' :
      System.out.println("The for :\n");
      System.out.println("for(initialization; condition; iteration)\n{");
      System.out.println("\t// body of loop\n}");
      break;

      case '4' :
      System.exit(0);
      break;

      default :
      System.out.println("Invalid Choice");
    }
}
}

Output :
When the above JAVA program is compiled or executed, it will produce the following results,
1.