VSCODE Alarm when using terminal to execute python file

[LinFen]

PS C:\Users\innov\Desktop\HelloWord> $python app.py
所在位置 行:1 字符: 9

• $python app.py

•     ~~~~~~
  

表达式或语句中包含意外的标记“app.py”。
+ CategoryInfo : ParserError: ( , ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken
file content :
print(“hello world ”)

print(“*” * 10)

[LinFen]

i have tryed that my code isn’t right
right one is :python app.py