java work

import java.util.*;
public class HailStorm{
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    System.out.println("Enter a start number ( Must be an integer )");
    int hail = scan.nextInt();
    do {
    if (hail % 2 == 0) 
    hail = (hail/2);
    System.out.println(hail);
    else hail = ((hail*3)+1)
    System.out.println(hail);
    }while (hail<= 1);
  }
}

ok guis im getting some bullshit errors and im new to this crap so some real help would be sweet. Any and all suggestions would be helpful.

in b4 tl;dr and become an hero

"7 errors found:
File: C:\homework\cs121\HailStorm.java  [line: 11]
Error: C:\homework\cs121\HailStorm.java:11: 'else' without 'if'
File: C:\homework\cs121\HailStorm.java  [line: 11]
Error: C:\homework\cs121\HailStorm.java:11: <identifier> expected
File: C:\homework\cs121\HailStorm.java  [line: 11]
Error: C:\homework\cs121\HailStorm.java:11: ';' expected
File: C:\homework\cs121\HailStorm.java  [line: 12]
Error: C:\homework\cs121\HailStorm.java:12: <identifier> expected
File: C:\homework\cs121\HailStorm.java  [line: 12]
Error: C:\homework\cs121\HailStorm.java:12: <identifier> expected
File: C:\homework\cs121\HailStorm.java  [line: 13]
Error: C:\homework\cs121\HailStorm.java:13: class, interface, or enum expected
File: C:\homework\cs121\HailStorm.java  [line: 14]
Error: C:\homework\cs121\HailStorm.java:14: class, interface, or enum expected
"

>>18
Limbo, the programming language for the Inferno OS. Of course, the original code is fairly useless, I assume it was homework.

    implement Menuops;
   
    include "sys.m";
        sys: Sys;
   
    include "bufio.m";
        bufio: Bufio;
        Iobuf: import bufio;
   
    Menuops: module
    {
        init:    fn();
        data:    fn(): string;
        dataint:    fn(): int;
        databig:    fn(): big;
        datareal:    fn(): real;
    };
   
    stdin: ref Iobuf;
   
    init()
    {
        sys = load Sys Sys->PATH;
        bufio = load Bufio Bufio->PATH;
        stdin = bufio->fopen(sys->fildes(0), bufio->OREAD);
    }
   
    data(): string
    {
        return stdin.gets('\n');
    }
   
    dataint(): int
    {
        return int data();
    }
   
    databig(): big
    {
        return big data();
    }
   
    datareal(): real
    {
        return real data();
    }