如何在 Mathematica 中打印带有 n 个前导零的整数？

Question

我尝试执行以下操作：

Do[
  f1 = StringReplace[
    "obsxxxx.out", {"xxxx" -> ToString[i]}];
  Print[f1];
  ,
  {i, 200}];

并获取

obs0001.out
obs0002.out
...
obs0010.out
...
obs0100.out
...

等等。

我尝试过：

ToString[Flatten[IntegerDigits[20, 10, 4]]]

但我还有一个清单......

Answer 1

也许你需要这样的东西：

Table[IntegerString[i, 10, 4], {i, 1, 10}]

给予

{"0001", "0002", "0003", "0004", "0005", "0006", "0007", "0008", 
"0009", "0010"}

或

Table["obs" <> IntegerString[i, 10, 4] <> ".out", {i, 1, 10}]

给予

{"obs0001.out", "obs0002.out", "obs0003.out", "obs0004.out",
“obs0005.out”，“obs0006.out”，“obs0007.out”，“obs0008.out”，
“obs0009.out”，“obs0010.out”}