In PowerShell, you have to use -lt and -gt, instead of < and > in comparation, like POSIX sh.
Especially if you wrongly use > like below, the comparison will be silently failed (evaluated as $false) and value of left-hand operand is wrote to a newly created file named “8”.
if ($_.length > 8) { ... }
For comparison, if you wrongly use < in comparison, comparison will cause an error like:
PS > if ($_.length < 8) { "a" } At line:1 char:15 + if ($_.length < 8) { "a" } + ~ The '<' operator is reserved for future use. + CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException + FullyQualifiedErrorId : RedirectionNotSupported
