#round

说明：求近似值。

def round(number, ndigits=None):
    '''
    求近似值

    :param number: 要计算的值
    :param ndigits: 保留的位数
    :return: 近似值
    '''

示例：

print(round(3.1415926))
print(round(3.1415926, 2))
print(round(2.71828))
print(round(2.71828, 2))
运行代码
>>> Establishing WebAssembly Runtime. 
>>> Standby. 
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