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#1
06-29-2012
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[Solved] what does this do? if [[ -n "${ENV_VAR}" ]]
Hi Guys! What does this do? Code:
if [[ -n "${ENV_VAR}" ]]what does -n option do here? I can't find the explanation using man test. Thanks in advance!
Last edited by vbe; 06-29-2012 at 11:53 AM.. Reason: code tags |
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#2
06-29-2012
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-n is a string operator, checking if the given operand size is non zero ... If the case, returns true.
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#3
06-29-2012
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Because of the double square brackets, this is actually a Conditional Expression not a Test. Therefore the explanation would be in the Conditional Expressions section of the manual for your Shell .
In most modern Shells it's actually the same explanation as Test. |
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