Math.getExponent : Math Functions « Development « Java Tutorial

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public class FloastPointDemo {
    public static void main (String[] args) {
      // Returns the unbiased exponent value of a double,
      // where 2^exp <= d. In this case, 2^4 <= 17
      int exp = Math.getExponent (17.0);
      System.out.println ("Math.getExponent (17.0) = " + exp);

    }
}

//

Math.getExponent (17.0) = 4