📏 绝对值计算器Absolute Value Calculator

使用说明与常见问题How-to & FAQ

「绝对值计算器」是什么？What is the Absolute Value Calculator tool?

求一组数的绝对值（任意长度小数按原文精确处理），或计算两数之差的绝对值（数轴距离）。Absolute value of a list of numbers (exact for any length), or the distance |a − b| between two numbers.

如何使用「绝对值计算器」？How do I use the Absolute Value Calculator tool?

在「绝对值计算器」中，填写「a（可选，与 b 一起求两数之差的绝对值）」、「b（可选）」等参数，结果会随输入实时计算并显示在下方。In the Absolute Value Calculator: Fill in "a (optional, with b: distance between a and b)", "b (optional)"; results are recalculated instantly as you type.

能处理多大的数？How large can the numbers be?

列表和 a、b 都按十进制文本精确计算，位数不限（例如 100000000000000000001 − 0.5）；列表中用科学计数法（如 1e20）写的数按双精度浮点处理，保留约 15 位有效数字。a、b 只接受普通小数写法。Both the list and a/b are computed exactly as decimal text, with no digit limit (e.g. 100000000000000000001 − 0.5). Numbers written in scientific notation in the list (like 1e20) use double precision (about 15 significant digits); a and b accept plain decimals only.

计算精度如何？How precise are the results?

「绝对值计算器」使用 JavaScript 双精度浮点数（约 15–16 位有效数字），部分功能使用 BigInt 处理大整数。The Absolute Value Calculator uses double-precision floating point (about 15–16 significant digits); some features use BigInt for large integers.

「绝对值计算器」免费吗？需要注册吗？Is the Absolute Value Calculator free? Do I need an account?

「绝对值计算器」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 Absolute Value Calculator is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.