How to convert all '<' to < if the '>' doesnot exists. For example: In the text, 
Read them in one <place with Google Reader,<a href="www.google.com"> n
+ew<

[download]
How to get the output as 
Read them in one &lt;place with Google Reader,<a href="www.google.com"
+> new&lt;

[download]
while(<DATA>){
s/</&lt;/g;
}

__DATA__
Read them in one <place with Google Reader,<a href="www.google.com"> n
+ew<

[download]

Code tags added by GrandFather

In reply to substitution on by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
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