Round a single number using default non-deterministic generator.
    
    @param x: to round.
    @param precision: decimal places to round.

def sround(x, precision=0):
    """
    Round a single number using default non-deterministic generator.
    
    @param x: to round.
    @param precision: decimal places to round.  
    """
    sr = StochasticRound(precision=precision)
    return sr.round(x)