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[[ ]]

[[ expression ]]

Korn shell only. Same as test expression or [ expression ] , except that [[ ]] allows additional operators. Word splitting and filename expansion are disabled. Note that the brackets ([ ] ) are typed literally, and that they must be surrounded by whitespace.

Additional Operators

&&

Logical AND of test expressions (short circuit).

||

Logical OR of test expressions (short circuit).

<

First string is lexically "less than" the second.

>

First string is lexically "greater than" the second.


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