ln 自然对数计算器(ln x 与 log₁₀ x)Natural Log Calculator (ln x and log₁₀ x)
计算 ln(x) = log_e(x),并同时给出常用对数 log₁₀(x)。x 须大于 0。本地处理。可设置「x (>0)」。Computes ln(x) = log_e(x) and also common log log₁₀(x). x must be greater than 0. Processed locally. Settings: x (>0).
使用说明与常见问题How-to & FAQ
「自然对数计算器(ln x 与 log₁₀ x)」是什么?What is the Natural Log Calculator (ln x and log₁₀ x) tool?
计算 ln(x) = log_e(x),并同时给出常用对数 log₁₀(x)。x 须大于 0。本地处理。可设置「x (>0)」。Computes ln(x) = log_e(x) and also common log log₁₀(x). x must be greater than 0. Processed locally. Settings: x (>0).
如何使用「自然对数计算器(ln x 与 log₁₀ x)」?How do I use the Natural Log Calculator (ln x and log₁₀ x) tool?
在「自然对数计算器(ln x 与 log₁₀ x)」中,填写「x (>0)」等参数,结果会随输入实时计算并显示在下方。In the Natural Log Calculator (ln x and log₁₀ x): Fill in "x (>0)"; results are recalculated instantly as you type.
ln 和 log 有什么区别?What is the difference between ln and log?
ln 专指以 e 为底;log 有时指 log₁₀,有时在高等数学里也指 ln。本页同时给出三种。ln is log base e; log often means log₁₀, though advanced texts may use log for ln. This page shows all three.
负数可以吗?What about negative x?
实数范围内 ln(x) 只对 x > 0 有定义。Over the reals, ln(x) is defined only for x > 0.
能举个计算实例吗?Can you show a worked example?
例如在「自然对数计算器(ln x 与 log₁₀ x)」中填 x (>0) = 2.718281828,结果区显示:ln(x):0.9999999998;log₁₀(x):0.4342944818For example, entering x (>0) = 2.718281828 in the Natural Log Calculator (ln x and log₁₀ x) gives: ln(x): 0.9999999998; log₁₀(x): 0.4342944818
有哪些选项可以调整?What options can I adjust?
「自然对数计算器(ln x 与 log₁₀ x)」的设置:「x (>0)」可留空。每次生成结果都按当前设置处理。Settings in the Natural Log Calculator (ln x and log₁₀ x) — "x (>0)" optional. The result always uses the current settings.
计算精度如何?How precise are the results?
「自然对数计算器(ln x 与 log₁₀ x)」使用 JavaScript 双精度浮点数(约 15–16 位有效数字);极大或极小的数值可能存在精度误差。The Natural Log Calculator (ln x and log₁₀ x) uses double-precision floating point (about 15–16 significant digits); very large or very small values may lose precision.
「自然对数计算器(ln x 与 log₁₀ x)」免费吗?需要注册吗?Is the Natural Log Calculator (ln x and log₁₀ x) free? Do I need an account?
「自然对数计算器(ln x 与 log₁₀ x)」完全免费,无需注册或安装,打开网页即可使用,手机和电脑都能用;输入的内容只在你的浏览器本地处理。The Natural Log Calculator (ln x and log₁₀ x) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.