Usually on bash command-line, the line break character is \. So when I first started to use PowerShell, the \ didn’t work for me. It turned out that the line-break or line continuation in PowerShell is the back tick: `.

Here is an exmaple of PowerShell command to create a DNS delegation in one line:

PS C:\ Add-DnsServerZoneDelegation -Name "example.net" -ChildZoneName "lab.example.net." -NameServer "idm.lab.example.net." -IPAddress 172.25.250.8 -PassThru -Verbose

And we can break it to mutiple line as:

PS C:\ Add-DnsServerZoneDelegation -Name "example.net" `
-ChildZoneName "lab.example.net." `
-NameServer "idm.lab.example.net." `
-IPAddress 172.25.250.8 -PassThru -Verbose

Reference: