./gradlew: The term './gradlew' 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
+ ./gradlew clean./gradlew clean./gradlew clean./gradlew clean
+ ~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (./gradlew:String) [], CommandNotFoundException
    + FullyQualifiedErrorId : CommandNotFoundException
PS C:\Users\walee\Desktop\Coding\Flutter\Flutter Projects\learningdart> ./gradlew clean
./gradlew: The term './gradlew' is not recognized as the name of a cmdlet, function, script file, or operable program. Check