static float squareRoot ( float n ) {
  float x = n ;
  float y = 1 ;
  double e = 0.000001 ;
  while ( x - y > e ) {
    x = ( x + y ) / 2 ;
    y = n / x ;
  }
  return x ;
}

static float squareRoot ( float n ) { float x = n ; float y = 1 ; double e = 0.000001 ; while ( x - y > e ) { x = ( x + y ) / 2 ; y = n / x ; } return x ; }
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