What is the difference between <%, <%=, <%# and -%> in ERB in Rails?

Can some one please describe the usage of the following characters which is used in ERB file:

what's the usage of each one ?

Executes the ruby code within the brackets.

Prints something into erb file.

Equivalent to ``. Prints something verbatim (i.e. w/o escaping) into erb file. (Taken from Ruby on Rails Guides.)

Avoids line break after expression.

Comments out code within brackets; not sent to client (as opposed to HTML comments).

Visit Ruby Doc for more infos about ERB.

Stack Overflow Q#7996695, score: 539