how to make variables in powershell code example

Example 1: set variable in powershell

Set-Variable -Name "desc" -Value "A description"
Get-Variable -Name "desc"

Name                           Value
----                           -----
desc                           A description

Example 2: powershell command line variables

write-host "There are a total of $($args.count) arguments"
for ( $i = 0; $i -lt $args.count; $i++ ) {
    write-host "Argument  $i is $($args[$i])"
}