Comments

Sass allows the use of single line comments //, in addition to CSS-style multiline comments /* */.
Interpolation (variable substitution) can occur within comments.
$c : "comment";

/* This #{$c} is
 * several lines long.
 * Since it uses the CSS #{$c} syntax,
 * it will appear in the CSS output. */
body { color: black; }

// These comments are only one line long each.
// They won't appear in the CSS output,
// since they use the single-line comment syntax.
a { color: green; }

/* This comment is
 * several lines long.
 * Since it uses the CSS comment syntax,
 * it will appear in the CSS output. */
body {
  color: black;
}

a {
  color: green;
}