🔁 反转整数各位数字Reverse Integer Digits

使用说明与常见问题How-to & FAQ

「反转整数各位数字」是什么？What is the Reverse Integer Digits tool?

把每个整数的数字左右颠倒（120 → 021），可选择去掉结果前导零。本地处理。Reverse the digits of each integer (120 -> 021); optionally drop leading zeros in the result. Processed locally.

如何使用「反转整数各位数字」？How do I use the Reverse Integer Digits tool?

在「反转整数各位数字」中，把内容粘贴或输入到上方输入框，结果会实时显示在下方，点击「复制结果」即可复制。例如输入「120」，得到「021」。Paste integers, one per line or separated by spaces; each has its digits reversed and keeps its sign, so 120 becomes 021. Tick "Drop leading zeros" to get 21 instead, then click "Copy result" to copy the output.

怎样输入多个整数？How do I enter several integers?

每行一个，或用空格、逗号、分号分隔。像 1,234,567 这样每 3 位一个逗号的写法按千位分隔读作一个数（所以 10,100 是 10100，要表示两个数请写 10 100）；也可以用下划线分组（1_000）。负号可用 -、−（U+2212）或全角 －，全角数字也能识别。小数、科学计数法（1e3）或夹杂文字会报错并指出是第几个、完整显示那个值。One per line, or separated by spaces, commas or semicolons. A value with a comma every three digits, like 1,234,567, is read as one number with thousands separators (so 10,100 is 10100; write 10 100 for two values); underscores also group digits (1_000). Minus can be a hyphen, the Unicode minus (U+2212) or the fullwidth minus, and fullwidth digits work. Decimals, scientific notation (1e3) or stray text give an error naming the position and showing the whole value.

结果精确吗？Are the results exact?

精确。所有整数都按大整数（BigInt）逐位处理，不经过浮点，超过 2^53 的数（例如 9007199254740993）也不会被舍入。粘贴几千上万行也是线性处理，通常在几十毫秒内完成。Yes. Every value is handled as a big integer (BigInt) with no floating-point step, so numbers above 2^53 such as 9007199254740993 are never rounded. Pasting thousands of lines is processed in linear time, usually within tens of milliseconds.

「反转整数各位数字」免费吗？需要注册吗？Is the Reverse Integer Digits free? Do I need an account?

「反转整数各位数字」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 Reverse Integer Digits is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.