Description of OR AND Operator

 
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# 1  
Old 07-23-2015
Description of OR AND Operator

From the below i would need the difference using between && and ||
Code:
 

error_func()
{
        # Standard error function
        [[ -n $* ]] && print -u2 "ERROR: $*"
        exit 1
}

 [[ -z ${TMPDIR} ]] && error_func "Source Directory is missing as input argument"
  [[ -d ${TMPDIR} ]] || error_func "Source Directory does not exists"

i would like to differnce between && ||




needed description



4. mce, pudhukotai, india



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# 2  
Old 07-23-2015
It checks the return status of the previous command. && runs the following command if it succeeds, || runs the following command if it fails. Working examples:

Code:
true && echo "this will print"
true || echo "this will not"
false && echo "this won't print"
false || echo "but this will"

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