RosettaCodeData/Task/Hailstone-sequence/PowerShell/hailstone-sequence.psh

function Get-HailStone {
    param($n)

    switch($n) {
        1              {$n;return}
        {$n % 2 -eq 0} {$n; return Get-Hailstone ($n = $n / 2)}
        {$n % 2 -ne 0} {$n; return Get-Hailstone ($n = ($n * 3) +1)}
    }
}

function Get-HailStoneBelowLimit {
    param($UpperLimit)

    for ($i = 1; $i -lt $UpperLimit; $i++) {
        [pscustomobject]@{
            'Number' = $i
            'Count' = (Get-HailStone $i).count
        }
    }
}