How to install PowerShell using PowerShell

This cmdlet is tricky to find in Google because searching for install powershell using powershell won’t give you much. So here it is:

Install-WindowsFeature PowerShell

or

Install-WindowsFeature PowerShell-V2

P.S. How to find exact name of particual Windows Feature to install?

Get-WindowsFeature | findstr PowerShell