python中浮点数末尾的后缀e+number是什么意思? [英] What does the suffix e+number mean in python at the end of a float?

问题描述

我使用 random.uniform(1,2**100) 生成范围 (0,2**100) 的随机浮点数.一些结果是:

<预><代码>>>>random.uniform(1,2**100)5.9798650563331964e+29>>>random.uniform(1,2**100)8.439133849811236e+29>>>random.uniform(1,2**100)1.1367823572756921e+30>>>random.uniform(1,2**100)6.467828850316163e+29>>>random.uniform(1,2**100)6.114089228136624e+29>>>random.uniform(1,2**100)5.8262139039159224e+29

我无法在每个数字的末尾获得 e+29 的解释.

解决方案

它被称为 E notation，它是科学符号的纯文本表示.

1.234e+56 表示 1.234 * 10**56 或更易读的形式 1.234 × 10⁵⁶.

I use random.uniform(1,2**100) to produce random floats to the range (0,2**100). Some results are :

>>> random.uniform(1,2**100)
5.9798650563331964e+29
>>> random.uniform(1,2**100)
8.439133849811236e+29
>>> random.uniform(1,2**100)
1.1367823572756921e+30
>>> random.uniform(1,2**100)
6.467828850316163e+29
>>> random.uniform(1,2**100)
6.114089228136624e+29
>>> random.uniform(1,2**100)
5.8262139039159224e+29

I can't get the interpretation of e+29 at the end of each number.

解决方案

It's know as E notation, which is plain text representation of scientific notation.

1.234e+56 means 1.234 * 10**56 or in more human readable form 1.234 × 10⁵⁶.

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