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Unable to understand if condition

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# 1  
Old 07-08-2013
Unable to understand if condition
Hi geeks,
I am trying to understand below if statement. can someone please explain me meaning of if condition.

Code:
    if [[ ${DEBUG} == 1 ]]
    then
        echo -e "1"
    fi

Thanks
Moderator's Comments:
Mod Comment Please use CODE tags.
Last edited by Don Cragun; 07-08-2013 at 05:13 AM.. Reason: Add code tags.
# 2  
Old 07-08-2013
If the value of DEBUG variable is 1 then print 1
# 3  
Old 07-08-2013
Thanks for the reply, that i know but it has no value defined.
# 4  
Old 07-08-2013
Quote:
Originally Posted by jagnikam
Thanks for the reply, that i know but it has no value defined.
It is a debugging tool.

If you run the script with something like:
Code:
./yourscript argument...

the "then" clauses in "if"s like this will be ignored. But, if you run the script using something like:
Code:
DEBUG=1 ./yourscript argument...

the debugging notes provided by the "echo"s in those "if"s will be printed.
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