I want to delete old version (0.5) and keep latest version (0.10) from a library.

How can I achieve it using PowerShell Script.

```
If(0.5 < 0.10)
{

 Remove version with 0.5 and keep 0.10
 But I doubt system takes 0.5 as 0.50 then the logic is not correct.

}

```

How can I get latest/current version number and delete older version?