bc: Comments

 
 2.3 Comments
 ============
 
 Comments in 'bc' start with the characters '/*' and end with the
 characters '*/'.  Comments may start anywhere and appear as a single
 space in the input.  (This causes comments to delimit other input items.
 For example, a comment can not be found in the middle of a variable
 name.)  Comments include any newlines (end of line) between the start
 and the end of the comment.
 
    To support the use of scripts for 'bc', a single line comment has
 been added as an extension.  A single line comment starts at a '#'
 character and continues to the next end of the line.  The end of line
 character is not part of the comment and is processed normally.