9.31.6 Local Labels
Local labels may be defined in two ways:
     
- $N, where N is a decimal number between 0 and 9
 - LABEL?, where LABEL is any legal symbol name. 
 
   Local labels thus defined may be redefined or automatically generated. 
The scope of a local label is based on when it may be undefined or reset. 
This happens when one of the following situations is encountered:
     
- .newblock directive see 
.newblock
 - The current section is changed (.sect, .text, or .data)
 - Entering or leaving an included file
 - The macro scope where the label was defined is exited