下面是一个简单的类图示例,用来表示一个名为FloatProcessor的类,该类封装了处理浮点数的方法: FloatProcessor- num: float+round_to_two_decimals() : float+format_to_two_decimals() : str+floor_to_two_decimals() : float 旅行图 让我们用一个旅行图的示例来说明使用上述三种方法处理浮点数的过程: 使用...
f = Math.round(x*100)/100; return f; } //制保留2位小数,如:2,会在2后面补上00.即2.00 function toDecimal2(x) { var f = parseFloat(x); if (isNaN(f)) { return false; } var f = Math.round(x*100)/100; var s = f.toString(); var rs = s.indexOf('.'); if (rs < 0...
Round to 2 decimal places using the round() function The round() function is Python’s built-in function for rounding float point numbers to the specified number of decimal places. You can specify the number of decimal places to round by providing a value in the second argument. The example...
方法二、使用round内置函数(会四舍五入) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 s=12.345a=round(s,2)print(a)#12.35s=12.3445a=round(s,2)print(a)#12.34 方法三、 使用decimal模块(四舍五入) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 from decimalimportDecimal s=12.3445a=Deci...
Signature: np.around(a, decimals=0, out=None) Docstring: Evenly round to the given number of decimals. 翻译就是:a表示需要保留小数位数的数组或数字,decimals表示要保留的小数位数 In [138]: np.around(3.124, 2) Out[138]: 3.12 In [139]: np.around(3.125, 2) ...
python标准库的解释及翻译round(number[, ndigits])Return the floating point value number rounded to ndigits digits after the decimal point. If ndigits is omitted, it returns the nearest integer to its input. Delegates to number.__round__(ndigits).For the built-in types...
>>> round(2.675, 2) 2.67python2和python3的doc中都举了个相同的栗子,原文是这么说的: NoteThe behavior of round() for floats can be surprising: for example, round(2.675, 2) gives 2.67 instead of the expected2.68. This is not a bug: it's a result of the fact that most decimal fraction...
python2和python3的doc中都举了个相同的例子,原文是这么说的: NoteThebehavior of round()forfloats can be surprising:forexample,round(2.675,2)gives2.67instead of the expected2.68.Thisisnota bug:it’s a result of the fact that mostdecimalfractions can’t be represented exactlyasafloat.SeeFloatingPoi...
参考链接: Python int() 猛的一看 int() round() math.floor() 这几个函数函数好像做的是同一件事情,很容易将他们弄混,下面是他们的一些不同之处: int()函数直接截去小数部分...floor() 得到最接近原数但是小于原数的部分round()得到最接近原数的整数(返回为
python2和python3的doc中都举了个相同的例子,原文是这么说的: Note The behavior of round() for floats can be surprising: for example, round(2.675, 2) gives 2.67 instead of the expected 2.68. This is not a bug: it’s a result of the fact that most decimal fractions can’t be represented...