Recently got a question regarding PowerShell installation hence this post took an existence.
How to Install PowerShell various versions
Can we have more than one version of Powershell?
Yes, You can have multiple versions PowerShell.
How to switch between Powershell version?
ps:\>Powershell -version 4
ps:\>Powershell -version 3
ps:\>Powershell -version 2
Hope this simple post solve various doubts.