How to add a white space between two numbers -Regex.Replace()

Question

Someone knows how to add a white space between two number when they do not have an space. So I have #,###,## and want #,## #,##

I have this:

2.100.000,000,04
300,450,06
23,011,87
54.845,37462.521,21

I want this:

2.100.000,00 0,04
300,45 0,06
23,01 1,87
54.845,37 462.521,21

In order to see if a replace should occur I did this expression \\,([0-9]{3})\\,

Thanks for your help.

Update 1

• Number format could be #.###.###,## (always with two decimals)

Answer 1

用$1 $2替换(,\\d{2})(\\d,)出现（ $1和$2是对捕获组的引用，具体取决于您可能需要使用\\1 \\2的语言或工具）。