package username.math;

import java.math.BigInteger;

/**
 * A collection of Math utilities.
 *
 * @author Samuel A. Rebelsky
 * @version 1.0 of September 2005
 */
public class Mathematician
{
  /**
   * Compute an approximate square root of nu.
   */
  public static double squareRoot(Number num)
  {
    double n = num.doubleValue();
    double lower = 1.0;
    double upper = n;
    double mid;
    while (upper-lower > 0.01) {
      mid = (upper+lower)/2.0;
      if (mid*mid < n)
        lower = mid;
      else
        upper = mid;
    } // while
    return (upper+lower)/2.0;
  } // squareRoot(Number)

} // class Mathematician