Powershell args acts as a placeholder

function test-conn{Test-Connection -Count 3 -ComputerName $args#args充当占位符的作用，这个占位符必须以args命名，否则不能识别，会抛出异常}Set-Alias tc Test-Conntc localhostResults

tc localhostSource        Destination     IPV4Address      IPV6Address                     ------        -----------     -----------      -----------                     5CD60537FF    localhost       127.0.0.1        ::1                             5CD60537FF    localhost       127.0.0.1        ::1                             5CD60537FF    localhost       127.0.0.1        ::1      

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Powershell args acts as a placeholder