java - Doing one more iteration after DO-While loops stops? -

i writing babylonian algorithm computing square root of positive number, , iteration should keep going until guess within 1% of previous guess. code have written gets iteration going 1 before error 1%. how can make 1 more iteration ? question straight, there way tell iterate untill error <1% ?

import java.util.scanner;  public class sqrt {      public static void main(string[] args){         scanner kb = new scanner(system.in);         system.out.print("\nplease enter desired positive number in order find root of two: ");          double num = kb.nextdouble();         double guess=0;          double r, g1, error;             if (num>=0){             guess = num/2;             do{                 r = num/guess;                 g1 = guess;                 guess = (guess+r)/2;                 error = (guess-g1)/guess;                 if (error<0){                     error = -error;                 }             }              while(error>0.01);             system.out.println("the square root of number " + num +" equal " +guess);          } else {             system.out.println("sorry number entered not positive number, , not have root of two");         }     } } 

add new counter gets increased in (former) exit loop condition.

int exit = 0;  {   ...   if (error <= 0.01) {     exit++;   } } while (exit < 2);