Conditional Iteration : Macro

[Sanchit]

Identify words in a list supplied as macro parameter.

If no word is found, display a message.

[Astounding]

For your first question, here's a link that may help:

http://blogs.sas.com/content/publishing/2015/01/30/sas-authors-tip-getting-the-macro-language-to-per...

For your second question, that's really something you ought to try to do yourself before asking for help.