code: public Num ceil() {
  		Num ceil = new Num();
  		BigDecimal c = this.toBigDecimal();
  		ceil.setValue(c.setScale(0, BigDecimal.ROUND_CEILING), null, null);
  		return ceil;
  	}
docs: Return new instance of Num with ceil value. e.g. for 3.5 -> 4.0
  
  @return