Why does “<! --” comment out a style rule, but “<!--” does not?

Question

Take it easy on me. I am just learning HTML.

Accroding to http://www.w3.org/TR/html-markup/syntax.html#comments and many other sites I\'ve seen such as this http://www.w

Answer 1

I've seen people use in CSS style block for compatibility purpose.

In this case, old browsers that don't support CSS will comment it out to avoid errors.

will be interpreted as

by old browsers that don't support CSS. This way these browsers avoid potential errors.

In modern browsers however, inside CSS style block will be ignored.

will be interpreted as

by browsers with CSS support.