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Re: Number to string headed by zeros

• To: mathgroup at smc.vnet.net
• Subject: [mg110305] Re: Number to string headed by zeros
• From: James Stein <mathgroup at stein.org>
• Date: Sun, 13 Jun 2010 04:08:02 -0400 (EDT)

I'm sure others will give better solutions, but in the meantime:

digitString[n_, w_] :=
  StringJoin @@ ToString /@ IntegerDigits[n, 10, w];


will return a string with 'w' characters representing integer 'n'.

You probably know how large a 'w' you need, otherwise this is more robust:


digitString[n_, w_] :=
  StringJoin @@
   ToString /@ IntegerDigits[n, 10, Max[w, IntegerDigits[n, 10] // Length]];


On Sat, Jun 12, 2010 at 2:32 AM, Rui <rui.rojo at gmail.com> wrote:

> I need to create strings out of integers, padding them with zeros,
> cause otherwise they end up sorted in the wrong order. "10.gif" before
> "1.gif".
> For now I'm gonna do it by adding 1000, converting to string, and
> taking the heading 1, but I'm sure there are better options. THanks
>
> Rui
>
>