Which Version of Codeigniter I am using?

#Which version of CodeIgniter am I currently using?

Ans:

Yes, the constant CI_VERSION will give you the current CodeIgniter version number.

CodeIgniter 2, it's defined in /system/core/CodeIgniter.php

For example,

echo CI_VERSION; // echoes something like 2.2.1

check the file system/core/CodeIgniter.php
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