NE was an obsolate alias for ne, which is removed completely from newer perls. You should just use ne if you mean string comparison, and != for numbers; in this example either are the same.

Perldoc perl570delta documents this change:

Incompatible Changes

(Note also stdout, which is an alias for STDOUT, but that is still supported. And the same for STDIN, STDERR)

In reply to Re: Problem with case sensitivity? by ambrus
in thread Problem with case sensitivity? by nimdokk

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