[Newbies] How to comment in Squeak Smalltalk?

Fri Nov 10 05:27:14 UTC 2017

In Squeak programming ,   "comment " is very needed in order to make the
source code easier for humans to understand and maintain.

However, I find "//"  and /*     */  to be not working. 

What can I do in order to comment in Squeak programming ? 

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Dig, dig where you are,
Down below's well.
Let those that walk in darkness shout, 
Down below's hell.
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Sent from: http://forum.world.st/Squeak-Beginners-f107673.html