Using regex to split string by Non Digit and Digit

Question

Ive seen a few answers that are similar but none seem to go far enough. I need to split the string when the letters change to numbers and back. The trick is the pattern is variable meaning there can be any number of letter or number groupings.

For Example

AB1000 => AB 1000
ABC1500 => ABC 1500
DE160V1 => DE 160 V 1
FGG217H5IJ1 => FGG 217 H 5 IJ 1
Etc.

Answer 1

You can use a regex like this:

[A-Z]+|\d+

Working demo

Answer 2

If you want to split the string, one way would be lookarounds :

string[] results = Regex.Split("FGG217H5IJ1", @"(?<=\d)(?=\D)|(?<=\D)(?=\d)");
Console.WriteLine(String.Join(" ", results)); //=> "FGG 217 H 5 IJ 1"