The conversation between human and AI assistant.
[|Human|] Given the following string of code, write a comment that describes what is being done.
[|AI|] # A variable named str is being defined and assigned the value 'Hello', which is a string data type. However, there is a syntax error since there is an extra single quote at the end of the value.
[|Human|] 
Given the following string of code, write a comment that describes what is being done.