number formatting

[monarch_dodra via Digitalmars-d-learn]

On Sunday, 20 April 2014 at 12:53:11 UTC, steven kladitis wrote:
> Note sure if you can edit messages once sent.
>
>  $13,456.67
>  245,678,541
>
>
> On Sunday, 20 April 2014 at 12:50:52 UTC, steven kladitis wrote:
>> How do you format numbers to have things like.
>> Leading $ or , or <CR> with or without leading zeros.
>>  for example $56.00
>>              $056.00
>>              $1,3456.67
>>              <345.89>CR

Simply add what you want in the format string. For example:

double d = 56.55;
writefln("$03.5s", d);
writefln("<.4s>CR", d);

will print
"$056.55"
"<56.55>CR"

I don't know of any "built-in" way to do number grouping.

Also, when dealing with monetary amounts, you shouldn't be using 
doubles (I'm not saying you are), but some other structure 
specifically designed to track cents. Ideally, such a structure 
would have built-in "toString" formating.