统计

$a = 1..10

# 求和
$a | Measure-Object -Sum | Select-Object -ExpandProperty Sum
# 计数
$a.Count

# 最大值
$a | Measure-Object -Maximum | Select-Object -ExpandProperty Maximum
# 最小值
$a | Measure-Object -Minimum | Select-Object -ExpandProperty Minimum

55
10

10
1