i don't know about this command that why it's not work even i install python propurelly, pip install virtualenv but didn't work "virtualenv env" this

Question

virtualenv.exe env virtualenv.exe : The term 'virtualenv.exe' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again. At line:1 char:1

• virtualenv.exe env

•   + CategoryInfo          : ObjectNotFound: (virtualenv.exe:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
  
  

i want to create env environmemt for my new flask project