how do i loop a answer ????

hi how do i loop my code below, so that when a wrong answer is entered it will loop back and keep asking the same question till it is answered right.

import java.io.*;
class School2
{
public static void main (String[]args) throws IOException
{
int answer;
int total;
int No1;
int No2;
No1 =1+(int) (Math.random()*10);
No2 =1+(int) (Math.random()*10);
total=No1*No2;

String line;
BufferedReader input = new BufferedReader(new InputStreamReader(System.in));

{

System.out.println("Mulitply "+ No1+" by "+ No2);
line = input.readLine();
answer = Integer.parseInt(line);

if (answer == total)
System.out.println("Well Done the answer was "+" "+total);

else
if (answer != total)
System.out.println("Sorry try again");


}
}
}

thanks if you can help

First of all: use code tags to preserve your indenting. The code you posted is very hard to read because all indenting is lost.
Second:

Code:

---

import java.io.*;

class School2
{
  public static void main (String[]args) throws IOException
  {
    int answer;
    int total;
    int No1;
    int No2;
    No1 =1+(int) (Math.random()*10);
    No2 =1+(int) (Math.random()*10);
    total=No1*No2;

    String line;
    BufferedReader input = new BufferedReader(new InputStreamReader(System.in));

    System.out.println("Mulitply "+ No1+" by "+ No2);
    while(true) {
      line = input.readLine();
      try {
        answer = Integer.parseInt(line);
      } catch(NumberFormatException e) {
        System.out.println("Please enter a valid number.");
        continue;
      }

      if (answer == total) {
        System.out.println("Well Done the answer was "+" "+total);
        break;
      } else
        System.out.println("Sorry try again");
    }
  }
}

---

Added the while loop, a try-catch block in case the user doesn't even enter a number and removed an redundant if.

On a side note: when the user enters the correct answer the computer replys with
"Well Done the answer was [real answer]"
Since the user just entered the correct answer, does it make sense to output it again?