/** 
 * Contains example methods for lecture, about loops.
 */
class Looper {

  
  static void doIt() {
    int i = 0;
    while (i < 1000000) {
        System.out.println("I am at " + i);
        i = i + 1;
    }
  }
  
  
  static double sumSqrtFrom0ToN(int n) {
    long startTime = System.currentTimeMillis();  
    
    int i = 0;
    double sumSoFar = 0;
    while (i < n) {
      sumSoFar = sumSoFar + Math.sqrt(i);
      i = i + 1;
    }
    
    long elapsedTime = System.currentTimeMillis()-startTime;
    System.out.println( "For fun: elapsed time was " + 
                      elapsedTime/1000.0 + "seconds" );
    return sumSoFar;
  }
  
  
  /** Return the 'fingerprint' of a string --
   * a number which is a summary of it's info
   * (but not necessariliy different than every
   * other String's fingerprint).
   * This is also called a "hash value".
   * @param wrd The String to fingerprint.
   * @return `wrd`s fingerprint.
   */
  static int fingerPrint( String wrd ) {
    int i = 0;  // Or, "nextIndexToLookAt"
    int fingerPrintSoFar = 0;
    while ( i < wrd.length() ) {
      fingerPrintSoFar = fingerPrintSoFar + (int)(wrd.charAt(i));
      i = i + 1;
    }
    return fingerPrintSoFar;
  }
  
}