how to use powershell on windows 10 to change path code example

Example 1: add to path windows powershell

$env:Path = "SomeRandomPath";             (replaces existing path) 
$env:Path += ";SomeRandomPath"            (appends to existing path)

Example 2: add to path windows powershell

setx PATH "$env:path;\the\directory\to\add" -m