flutter doctor is not recognized as an internal or external command

flutter is not recognized as an internal and external command,flutter,flutter doctor,is not recognized as an internal or external command,flutter is not recognized as internal or external command,git is not recognized as an internal or external command,where' is not recognized as an internal or external command,where is not recognized as an internal or external flutter

C:\Windows\System32;C:\src\flutter\bin;C:\Windows\System32\WindowsPowerShell\v1.0;