Python与C类型的float,double和long类型等效吗? [英] What is the Python equivalent of C types float, double and long?
问题描述
这些C类型的Python等效于什么:
What is the Python equivalent of these C types:
float
double
long
我想代表上述三个区域中的 float
I want to represent a float
in the above three forms.
推荐答案
我相信您的意思是类型,而不是函数。在C语言中, double
只是双精度 float
(意味着较小的数字会更准确地表示)。在Python中,它只是一个 float
。类似地, long
只是(<)$ int
存储更大的数字。
I believe you mean types, not functions. In C, a double
is just a double-precision float
(meaning smaller numbers are represented more accurately). In Python, it's just a float
. Similarly, a long
is (was) just an int
that stored larger numbers.
在Python 2中,有 int
, long
和浮动
。但是,当Python增长到 sys.intmax $以上时,它会自动将
int
提升为 long
。 c $ c>。这意味着在Python中使用 long
毫无意义。它会在需要时自动变成 long
。 浮动
在内部表示为 double
。
In Python 2, there is int
, long
, and float
. However, Python automatically promotes int
to long
when it grows above sys.intmax
. That means there is no point in ever using long
in Python. It will turn into a long
automatically when it needs to. A float
is represented as a double
internally.
简短的答案是只使用 int
和 float
,而不必担心基础实现。
The short answer is to just use int
and float
, and don't worry about the underlying implementation. Python abstracts that away for you.
您可以将 int
转换为 float
(并返回),像这样:
You can convert an int
to a float
(and back) like this:
#!/usr/bin/python
number = 45
real_number = 3.14159265359
number_as_float = float(number)
real_number_as_int = int(real_number)
查看有关标准Python类型的更多信息这里。
See more about the standard Python types here.
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