Error when executing in Windows Powershell.

[Blijftijds]

I got the following error when executing the windows commands in Powershell: "PS C:\Users#########\DDoS-Ripper> cd DDoS-Ripper ls Set-Location : A positional parameter cannot be found that accepts argument 'ls'. At line:1 char:1

• cd DDoS-Ripper ls

•   + CategoryInfo          : InvalidArgument: (:) [Set-Location], ParameterBindingException
    + FullyQualifiedErrorId : PositionalParameterNotFound,Microsoft.PowerShell.Commands.SetLocationCommand" 
    Could you try to fix this issue or am I doing something incorrectly?